Marco Chiudinelli of Switzerland wipes his face with a towel during his match against Croatia's Marin Cilic during their match at the Swiss Indoors ATP men's tennis tournament in Basel, Switzerland October 28, 2015. REUTERS/Arnd Wiegmann 

Marco Chiudinelli of Switzerland returns the ball to Croatia's Marin Cilic during their match at the Swiss Indoors ATP men's tennis tournament in Basel, Switzerland October 28, 2015. REUTERS/Arnd Wiegmann 

Marco Chiudinelli of Switzerland returns the ball to Croatia's Marin Cilic during their match at the Swiss Indoors ATP men's tennis tournament in Basel, Switzerland October 28, 2015. REUTERS/Arnd Wiegmann 

Marco Chiudinelli of Switzerland returns the ball to Croatia's Marin Cilic during their match at the Swiss Indoors ATP men's tennis tournament in Basel, Switzerland October 28, 2015. REUTERS/Arnd Wiegmann 

Croatia's Marin Cilic returns the ball to Marco Chiudinelli of Switzerland during their match at the Swiss Indoors ATP men's tennis tournament in Basel, Switzerland October 28, 2015. REUTERS/Arnd Wiegmann 

Netherland's Matwe Middelkoop (R) and Theimo de Bakker react after winning their Group play-off tennis double match against Roger Federer and Marco Chiudinelli of Switzerland at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Netherland's Matwe Middelkoop (L) and Theimo de Bakker react after winning their Group play-off tennis double match against Roger Federer and Marco Chiudinelli of Switzerland at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Netherland's Matwe Middelkoop (R) and Theimo de Bakker react during their Group play-off tennis double match against Roger Federer and Marco Chiudinelli of Switzerland at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Netherland's Matwe Middelkoop (L) and Theimo de Bakker react during their Group play-off tennis double match against Roger Federer and Marco Chiudinelli of Switzerland at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) is hit by a ball next to Marco Chiudinelli during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) talks to Marco Chiudinelli during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (L) returns the ball next to Marco Chiudinelli during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (L) talks to Marco Chiudinelli during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer serves a ball next to Marco Chiudinelli (not pictured) during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Netherland's Matwe Middelkoop (C), Theimo de Bakker (R) and team captain Jan Siemerink react during their Group play-off tennis double match against Roger Federer and Marco Chiudinelli of Switzerland at the Palexpo Arena in Geneva, Switzerland September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Marco Chiudinelli (2R) returns the ball next to Roger Federer (not pictured) during their Group play-off tennis double match against Matwe Middelkoop (L) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) returns the ball next to Marco Chiudinelli (2L) during their Group play-off tennis double match against Matwe Middelkoop (2R) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) returns the ball next to Marco Chiudinelli (2L) during their Group play-off tennis double match against Matwe Middelkoop (2R) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) and Marco Chiudinelli (2L) react during their Group play-off tennis double match against Matwe Middelkoop (L) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer returns a ball next to Marco Chiudinelli (not pictured) during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) returns the ball next to Marco Chiudinelli (L) during their Group play-off tennis double match against Matwe Middelkoop (2R) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (C) and Marco Chiudinelli (L) talk to team captain Severin Luethi during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) and Marco Chiudinelli react during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (L) and Marco Chiudinelli react during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (R) returns the ball next to Marco Chiudinelli (C) during their Group play-off tennis double match against Matwe Middelkoop (L) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer (C) returns the ball next to Marco Chiudinelli (R) during their Group play-off tennis double match against Matwe Middelkoop (L) and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Switzerland's Roger Federer serves a ball next to Marco Chiudinelli (not pictured) during their Group play-off tennis double match against Matwe Middelkoop and Theimo de Bakker of the Netherlands at the Palexpo Arena in Geneva September 19, 2015. REUTERS/Denis Balibouse 

Swiss tennis team members (L to R) Henri Laaksonen, Marco Chiudinelli, captain Severin Luethi, Stan Wawrinka and Roger Federer and Dutch tennis team members (6L to R) Thiemo de Bakker, Jesse Huta Galun, Jean-Julien Rojer, Matwe Middelkoop and captain Jan Simmering pose for the official picture at the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

Swiss tennis team members (L to R) Henri Laaksonen, Marco Chiudinelli, Stan Wawrinka and Roger Federer attend the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

Swiss tennis team members (L to R) captain Severin Luethi, Henri Laaksonen, Marco Chiudinelli, Stan Wawrinka and Roger Federer attend the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

Swiss tennis team members (L to R) Henri Laaksonen, Marco Chiudinelli, captain Severin Luethi, Stan Wawrinka and Roger Federer pose for the official picture at the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

Swiss tennis team member Marco Chiudinelli (L) takes a selfie with Stan Wawrinka and Roger Federer (R) during the the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

Swiss tennis player Marco Chiudinelli (L) sits while Roger Federer (C) shakes hands with Dutch player Jesse Huta Galung during the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

Swiss tennis team members (L to R) Henri Laaksonen, Marco Chiudinelli, captain Severin Luethi, Stan Wawrinka and Roger Federer attend the draw ceremony for Swiss and Dutch Davis Cup teams ahead of the matches in Geneva, Switzerland, September 17, 2015. REUTERS/Pierre Albouy 

(L-R) Switzerland's Davis Cup tennis team members Michael Lammer, Stanislas Wawrinka, captain Severin Luethi, Roger Federer and Marco Chiudinelli pose with the Davis Cup trophy after a ceremony in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT TENNIS) 

(L-R) Switzerland's Davis Cup tennis team members Michael Lammer, Marco Chiudinelli, captain Severin Luethi, Roger Federer and Stanislas Wawrinka celebrate with the Davis Cup trophy during a ceremony in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT TENNIS)

(L-R) Switzerland's Davis Cup tennis team members Michael Lammer, Marco Chiudinelli, captain Severin Luethi, Roger Federer and Stanislas Wawrinka celebrate with the Davis Cup trophy during a ceremony in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT TENNIS)

Switzerland's Davis Cup tennis team members captain Severin Luthi, Michael Lammer, Marco Chiudinelli, Roger Federer and Stanislas Wawrinka (L-R) celebrate with the Davis Cup trophy during a ceremony in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT TENNIS)

Switzerland's Davis Cup tennis team members captain Severin Luthi, Michael Lammer, Marco Chiudinelli, Roger Federer and Stanislas Wawrinka (L-R) celebrate with the Davis Cup trophy during a ceremony in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT TENNIS)

Switzerland's Davis Cup tennis team members captain Severin Luthi, Michael Lammer, Marco Chiudinelli, Roger Federer and Stanislas Wawrinka (L-R) celebrate with the Davis Cup trophy during a ceremony in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND) 

A spectator holds a dog before a ceremony to welcome Switzerland's Davis Cup tennis team members Michael Lammer, Marco Chiudinelli, Stanislas Wawrinka, Roger Federer and captain Severin Luthi in Lausanne November 24, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Denis Balibouse (SWITZERLAND - Tags: SPORT TENNIS ANIMALS)

Switzerland's team members from L-R, Marco Chiudinelli, Roger Federer, Davis Cup tennis team captain Severin Luthi, Stanislas Wawrinka and Michael Lammer celebrate with the Davis Cup trophy after winning the Davis Cup tennis tournament final match against France at the Pierre-Mauroy stadium in Villeneuve d'Ascq, near Lille, November 23, 2014. Roger Federer beat Richard Gasquet on Sunday to give Switzerland their first Davis Cup title with a 3-1 victory over hosts France in the final. REUTERS/Gonzalo Fuentes (FRANCE - Tags: SPORT TENNIS)

Switzerland's team members, from L-R, Michael Lammer, Marco Chiudinelli, Stanislas Wawrinka, Roger Federer and Davis Cup tennis team captain Severin Luthi pose with the Davis Cup trophy after winning the Davis Cup tennis tournament final match against France at the Pierre-Mauroy stadium in Villeneuve d'Ascq, near Lille, November 23, 2014. REUTERS/Gonzalo Fuentes (FRANCE - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)

Marco Chiudinelli of Switzerland leaves the court after losing his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS) 

Marco Chiudinelli of Switzerland discusses with the referee during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Croatia's Ivan Dodig reacts after winning his match against Marco Chiudinelli of Switzerland at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS) 

Croatia's Ivan Dodig returns the ball during his match against Marco Chiudinelli of Switzerland at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS) 

Marco Chiudinelli of Switzerland returns the ball during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS) 

Marco Chiudinelli of Switzerland reacts during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Marco Chiudinelli of Switzerland reacts during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/A.Taverner Langenharterstr.3/4 8 (SWITZERLAND - Tags: SPORT TENNIS)

Marco Chiudinelli of Switzerland reacts during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Marco Chiudinelli of Switzerland serves the ball during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS HEADSHOT)

Marco Chiudinelli of Switzerland reacts during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Marco Chiudinelli of Switzerland serves the ball during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS) 

Marco Chiudinelli of Switzerland returns the ball during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Marco Chiudinelli of Switzerland returns the ball during his match against Croatia's Ivan Dodig at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Croatia's Ivan Dodig reacts during his match against Marco Chiudinelli of Switzerland at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Croatia's Ivan Dodig returns the ball during his match against Marco Chiudinelli of Switzerland at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Croatia's Ivan Dodig returns the ball during his match against Marco Chiudinelli of Switzerland at the Swiss Indoors ATP tennis tournament in Basel October 21, 2014. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: SPORT TENNIS)

Switzerland's Roger Federer (C) celebrates with Marco Chiudinelli (L) and Michael Lammer after winning his Davis Cup semi-final tennis match against Italy's Fabio Fognini at the Palexpo in Geneva September 14, 2014. REUTERS/Pierre Albouy (SWITZERLAND - Tags: SPORT TENNIS)