Actor Benedict Cumberbatch and his father Timothy (R) on Centre Court at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Stefan Wermuth

Actor Hugh Grant on Centre Court at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Stefan Wermuth

Pippa Middleton on Centre Court at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Toby Melville

Jelena Djokovic, wife of Novak Djokovic of Serbia reacts after he lost the second set during his Men's Singles Final match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Suzanne Plunkett

Jelena Djokovic, wife of Novak Djokovic of Serbia watches before his Men's Singles Final match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Stefan Wermuth

Mirka Federer, wife of Roger Federer of Switzerland watches before his Men's Singles Final match against Novak Djokovic of Serbia at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Stefan Wermuth

Swiss Federal Councillor Simonetta Sommaruga (L) on Centre Court at the Wimbledon Tennis Championships in London, July 12, 2015. REUTERS/Stefan Wermuth

Editor of American Vogue Anna Wintour on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Scotland's First Minister Nicola Sturgeon and Peter Murrell (R) on Centre Court at the Wimbledon Tennis Championships in London, July 11, 2015. REUTERS/Toby Melville

Editor of American Vogue Anna Wintour (L) and Oracene Price, mother of Serena Williams of the U.S.A before her match against Garbine Muguruza of Spain on Centre Court at the Wimbledon Tennis Championships in London, July 11, 2015. REUTERS/Toby Melville

Kim Murray, wife of Andy Murray of Britain before his match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Toby Melville

Rapper Drake, on Centre Court at the Wimbledon Tennis Championships in London, July 11, 2015. REUTERS/Toby Melville

Actor Sienna Miller on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Toby Melville

Actor Will Poulter arrives on Centre Court at the Wimbledon Tennis Championships in London, July 9, 2015. REUTERS/Stefan Wermuth 

Judy Murray, mother of Andy Murray of Britain before his match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Britian's Prince Andrew (R) on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Toby Melville

Kim Murray and Andy Murray watch the Men's Doubles Final match involving Jean-Julien Rojer of the Netherlands and Horia Tecau of Romania against Jamie Murray of Britain and John Peers of Australia at the Wimbledon Tennis Championships in London, July 11, 2015. REUTERS/Suzanne Plunkett

Kim Murray (R), wife of Andy Murray of Britain and his coach Amelie Mauresmo (L) cheer during his match against Roger Federer of Switzerland at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Toby Melville

Mirka Federer, wife of Roger Federer of Switzerland arrives before his match against Andy Murray of Britain at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Former tennis player Bjorn Borg and his wife Patricia on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Former footballer Thierry Henry with Andrea Rajacic and Former Manchester United manager Sir Alex Ferguson on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Actor Sienna Miller on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Actor Charles Dance on Centre Court at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Editor of American Vogue Anna Wintour talks to former tennis player Lindsay Davenport at the Wimbledon Tennis Championships in London, July 10, 2015. REUTERS/Suzanne Plunkett

Pippa Middleton and James Middleton arrive on Centre Court at the Wimbledon Tennis Championships in London, July 9, 2015. REUTERS/Stefan Wermuth 

Former footballer David Beckham and his son Romeo on Centre Court at the Wimbledon Tennis Championships in London, July 8, 2015. REUTERS/Suzanne Plunkett 

Britain's Catherine Duchess of Cambridge and Prince William (R) in the royal box on Centre Court at the Wimbledon Tennis Championships in London, July 8, 2015. REUTERS/Suzanne Plunkett 

Actor Josh Hartnett and partner Tamsin Egerton on Centre Court at the Wimbledon Tennis Championships in London, July 8, 2015. REUTERS/Suzanne Plunkett 

Former footballer David Beckham and his mother Sandra Beckham at the Wimbledon Tennis Championships in London, July 9, 2015. REUTERS/Kirsty Wigglesworth/Pool 

Actor Bradley Cooper watches the match between Roger Federer of Switzerland and Gilles Simon of France at the Wimbledon Tennis Championships in London, July 8, 2015. REUTERS/Toby Melville 

Opera singer Katherine Jenkins on Centre Court at the Wimbledon Tennis Championships in London, July 7, 2015. REUTERS/Stefan Wermuth 

Entertainer Stephen Fry and former tennis player Martina Navratilova at the Wimbledon Tennis Championships in London, July 9, 2015. REUTERS/Kirsty Wigglesworth/Pool 

Britain's Camilla, Duchess of Cornwall sits in the royal box at the Wimbledon Tennis Championships in London, July 2, 2015. REUTERS/Stefan Wermuth 

Rapper Drake (R) watch the match between Serena Williams and Venus Williams of the U.S.A. at the Wimbledon Tennis Championships in London, July 6, 2015. REUTERS/Toby Melville 

Former tennis player Martina Navratilova waves to spectators on Centre Court as she is introduced at the Wimbledon Tennis Championships in London, July 4, 2015. REUTERS/Henry Browne 

German footballer Bastian Schweinsteiger gestures at the Wimbledon Tennis Championships in London, July 1, 2015. REUTERS/Stefan Wermuth 

Former racing driver Jackie Stewart (R) sits on Centre Court at the Wimbledon Tennis Championships in London, June 29, 2015. REUTERS/Suzanne Plunkett 

Actor Jack O'Connell (R) watches the action on Centre Court at the Wimbledon Tennis Championships in London, July 7, 2015. REUTERS/Stefan Wermuth 

Model's Chrissy Teigen (L) and Karlie Kloss at the Wimbledon Tennis Championships in London, July 6, 2015. REUTERS/Toby Melville 

Former tennis player Ilie Nastase in the royal box on Centre Court at the Wimbledon Tennis Championships in London, July 6, 2015. REUTERS/Toby Melville 

Golfer Miguel Angel Jimenez (R) in the royal box on Centre Court at the Wimbledon Tennis Championships in London, July 6, 2015. REUTERS/Toby Melville 

Golfers Lee Westwood and Ian Poulter in the royal box on Centre Court at the Wimbledon Tennis Championships in London, July 6, 2015. REUTERS/Toby Melville