Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro in action during his singles match against Croatia's Ivo Karlovic. REUTERS/Antonio Bronic 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after his victory against Croatia's Ivo Karlovic. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after winning his singles match against Croatia's Ivo Karlovic. REUTERS/Antonio Bronic 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after winning his singles match against Croatia's Ivo Karlovic. REUTERS/Antonio Bronic 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro in action during his singles match against Croatia's Ivo Karlovic. REUTERS/Antonio Bronic 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after his victory against Croatia's Ivo Karlovic. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after winning his singles match against Croatia's Ivo Karlovic. REUTERS/Antonio Bronic 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after winning his singles match against Croatia's Ivo Karlovic. REUTERS/Antonio Bronic 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after his victory against Croatia's Ivo Karlovic. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Argentina's Juan Martin del Potro reacts after his victory against Croatia's Ivo Karlovic. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic celebrates his victory over Argentina's Federico Delbonis. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic celebrates his victory over Argentina's Federico Delbonis. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic celebrates his victory over Argentina's Federico Delbonis. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic celebrates his victory over Argentina's Federico Delbonis. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic celebrates his victory over Argentina's Federico Delbonis. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic celebrates his victory over Argentina's Federico Delbonis. REUTERS/Marko Djurica 

Tennis - Croatia v Argentina - Davis Cup Final - Arena Zagreb, Croatia - 25/11/16 Croatia's Marin Cilic reacts after winning his match against Argentina's Federico Delbonis. REUTERS/Antonio Bronic 

Alan Cumming gives a peace sign as he arrives at the International Emmy Awards in Manhattan, New York, U.S. November 21, 2016. REUTERS/Mark Kauzlarich 

Alan Cumming gives a peace sign as he arrives at the International Emmy Awards in Manhattan, New York, U.S. November 21, 2016. REUTERS/Mark Kauzlarich 

Josh Dun (L) and Tyler Joseph, of the band Twenty One Pilots, accept the award for favorite pop/rock duo or group at the 2016 American Music Awards in Los Angeles, California, U.S., November 20, 2016. REUTERS/Mario Anzuoni 

Tennis Britain - Barclays ATP World Tour Finals - O2 Arena, London - 20/11/16 Great Britain's Andy Murray celebrates winning the final against Serbia's Novak Djokovic Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Tennis Britain - Barclays ATP World Tour Finals - O2 Arena, London - 20/11/16 Great Britain's Andy Murray celebrates winning the final against Serbia's Novak Djokovic Action Images via Reuters / Paul Childs Livepic EDITORIAL USE ONLY. 

Golf - DP World Tour championship- Dubai, UAE - 20/11/16 - Matthew Fitzpatrick of England reacts after winning DP World Tour championship. REUTERS/Ahmed Jadallah 

Golf - DP World Tour championship- Dubai, UAE - 20/11/16 -Matthew Fitzpatrick of England reacts after winning DP World Tour championship. REUTERS/Ahmed Jadallah 

Golf - DP World Tour championship- Dubai, UAE - 20/11/16 -Matthew Fitzpatrick of England reacts after winning DP World Tour championship. REUTERS/Ahmed Jadallah 

Golf - DP World Tour championship- Dubai, UAE - 20/11/16 -Matthew Fitzpatrick of England reacts after winning DP World Tour championship. REUTERS/Ahmed Jadallah 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 17/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Belgium's David Goffin Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 17/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Belgium's David Goffin Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 16/11/16 Switzerland's Stanislas Wawrinka celebrates winning his round robin match with Croatia's Marin Cilic Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 16/11/16 Switzerland's Stanislas Wawrinka celebrates winning his round robin match with Croatia's Marin Cilic Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 16/11/16 Switzerland's Stanislas Wawrinka celebrates winning his round robin match with Croatia's Marin Cilic Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 16/11/16 Switzerland's Stanislas Wawrinka celebrates winning his round robin match with Croatia's Marin Cilic Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 16/11/16 Switzerland's Stanislas Wawrinka celebrates winning his round robin match with Croatia's Marin Cilic Reuters / Toby Melville Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 15/11/16 Serbia's Novak Djokovic celebrates winning the first set in his round robin match with Canada's Milos Raonic Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 15/11/16 Serbia's Novak Djokovic celebrates winning the first set in his round robin match with Canada's Milos Raonic Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 15/11/16 Serbia's Novak Djokovic celebrates winning the first set in his round robin match with Canada's Milos Raonic Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 15/11/16 Serbia's Novak Djokovic celebrates winning the first set in his round robin match with Canada's Milos Raonic Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 14/11/16 Japan's Kei Nishikori celebrates after winning his round robin match against Switzerland's Stanislas Wawrinka Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 14/11/16 Japan's Kei Nishikori celebrates after winning his round robin match against Switzerland's Stanislas Wawrinka Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 13/11/16 Serbia's Novak Djokovic celebrates winning his round robin match with Austria's Dominic Thiem Action Images via Reuters / Tony O'Brien Livepic EDITORIAL USE ONLY. 

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 13/11/16 France's Caroline Garcia celebrates her victory against Czech Republic's Karolina Pliskova. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 France's Caroline Garcia celebrates her victory against Czech Republic's Petra Kvitova. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 France's Caroline Garcia celebrates her victory against Czech Republic's Petra Kvitova. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 France's Caroline Garcia celebrates her victory against Czech Republic's Petra Kvitova. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 France's Caroline Garcia celebrates her victory against Czech Republic's Petra Kvitova. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 Czech Republic's Karolina Pliskova celebrates her victory against France's Kristina Mladenovic. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 Czech Republic's Karolina Pliskova celebrates with team members her victory against France's Kristina Mladenovic. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 Czech Republic's Karolina Pliskova celebrates with her team captain Petr Pala her victory against France's Kristina Mladenovic. REUTERS/Vincent Kessler 

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 Czech Republic's Karolina Pliskova celebrates her victory against France's Kristina Mladenovic. REUTERS/Vincent Kessler

Tennis - Fed Cup Final - France v Czech Republic - Strasbourg, France - 12/11/16 Czech Republic's Karolina Pliskova celebrates with team members her victory against France's Kristina Mladenovic. REUTERS/Vincent Kessler

Football Soccer - Spanish La Liga Santander - Sevilla v Barcelona - Ramon Sanchez Pizjuan Stadium, Seville, Spain - 6/11/2016. Barcelona's Luis Suarez celebrates after scoring against Sevilla. REUTERS/ Marcelo del Pozo 

Manny Pacquiao celebrates his victory over WBO welterweight champion Jessie Vargas following their title fight at the Thomas & Mack Center in Las Vegas, Nevada, U.S., November 5, 2016. Filipino trainer Buboy Fernandez is at lower right. REUTERS/Las Vegas Sun/Steve Marcus 

Manny Pacquiao of the Philippines celebrates his victory after defeating WBO welterweight champion Jessie Vargas of Las Vegas at the Thomas & Mack Center in Las Vegas, Nevada, U.S., November 5, 2016. REUTERS/Las Vegas Sun/Steve Marcus