Sport

Croatia's Marin Cilic celebrates after winning a point against Argentina's Federico Delbonis, during their singles match at the Davis Cup tennis tournament final between the two countries in Zagreb, Croatia, Friday, Nov. 25, 2016. (AP Photo/Darko Vojinovic)

Darko Vojinovic/AP

Croatia’s Marin Cilic celebrates after winning a point against Argentina’s Federico Delbonis, during their singles match at the Davis Cup tennis tournament final between the two countries in Zagreb, Croatia. Photo Darko Vojinovic/AP 

Swiss Freestyle Motocross  driver Mat Rebeaud performs a figure during a FMX jump training session ten days before the 31st Geneva International Supercross, in Payerne, Switzerland, Tuesday, Nov.22, 2016. (Laurent Gillieron/Keystone via AP)

Laurent Gillieron/Keystone/AP

Swiss Freestyle Motocross driver Mat Rebeaud performs a figure during a FMX jump training session ten days before the 31st Geneva International Supercross, in Payerne, Switzerland. Photo Laurent Gillieron/Keystone/AP) 

Britain Tennis - Barclays ATP World Tour Finals - O2 Arena, London - 15/11/16 Austria's Dominic Thiem in action during his round robin match with France's Gael Monfils  Reuters / Stefan Wermuth Livepic EDITORIAL USE ONLY.

Stefan Wermuth Livepic/Reuters

Austria’s Dominic Thiem in action during his round robin match with France’s Gael Monfils during Barclays ATP World Tour Finals at the O2 Arena, London. Photo Stefan Wermuth Livepic/Reuters 

Britain Rugby Union - England Training - Pennyhill Park, Bagshot, Surrey - 10/11/16 England's Chris Robshaw, Dave Atwood and Nathan Hughes during training  Action Images via Reuters / Andrew Boyers Livepic EDITORIAL USE ONLY.

Andrew Boyers/Livepic/Reuters

Chris Robshaw, Dave Atwood and Nathan Hughes from The English rugby team train at Pennyhill Park, Bagshot, Surrey. Photo Andrew Boyers/Livepic/Reuters

Svetlana Kuznetsova of Russia covers her head with her towel after the first set during her singles match against Garbine Muguruza of Spain at the WTA tennis tournament in Singapore, Friday, Oct. 28, 2016. (AP Photo/Wong Maye-E)

Wong Maye-E/AP

Svetlana Kuznetsova of Russia covers her head with her towel after the first set during her singles match against Garbine Muguruza of Spain at the WTA tennis tournament in Singapore. Photo Wong Maye-E/AP 

Frankie Dettori celebrates after riding Ardad to victory in the Pepsi Max Flying Childers Stakes during day three of the 2016 Ladbrokes St Leger Festival at Doncaster Racecourse, Doncaster. PRESS ASSOCIATION Photo. Picture date: Friday September 9, 2016. See PA story RACING Doncaster. Photo credit should read: Anna Gowthorpe/PA Wire

Anna Gowthorpe/PA

Frankie Dettori celebrates after riding Ardad to victory in the Pepsi Max Flying Childers Stakes during day three of the 2016 Ladbrokes St Leger Festival at Doncaster Racecourse, Doncaster

United States' Michael Phelps competes in a men's 200-meter butterfly heat during the swimming competitions at the 2016 Summer Olympics

Michael Sohn/AP

United States’ Michael Phelps competes in a men’s 200-meter butterfly heat during the swimming competitions at the 2016 Summer Olympics

People play volleyball on Copacabana beach ahead of the Rio Olympic Games, Brazil. PRESS ASSOCIATION Photo. Picture date: Tuesday August 2, 2016. Photo credit should read: Mike Egerton/PA Wire. EDITORIAL USE ONLY

Mike Egerton/PA

People play volleyball on Copacabana beach ahead of the Rio Olympic Games, Brazil 

France Cycling Tour de France

Kenzo Tribouillard via AP Photo

Britain’s Chris Froome follows his teammates as they set the pace in the climb during the seventeenth stage of the Tour de France cycling race over 184.5 kilometers on Wednesday

Cycling - Tour de France cycling race - Stage 12 from Montpellier to Chalet-Reynard

Jean-Paul Pelissier/Reuters

Yellow jersey leader Chris Froome of Britain runs on the road after a fall,
on the 178-km Stage 12 from Montpellier to Chalet-Reynard during the Tour de France

A view of USA's John Daly's trousers during day one of The Open Championship 2016 at Royal Troon Golf Club, South Ayrshire. PRESS ASSOCIATION Photo. Picture date: Thursday July 14, 2016. See PA story GOLF Open. Photo credit should read: Peter Byrne/PA Wire. RESTRICTIONS: Editorial use only. No commercial use. Still image use only. The Open Championship logo and clear link to The Open website (TheOpen.com) to be included on website publishing. Call +44 (0)1158 447447 for further information.

Peter Byrne/PA

A view of USA’s John Daly’s trousers during day one of The Open Championship 2016 at Royal Troon Golf Club, South Ayrshire

Cycling - Tour de France cycling race - The 162.5 km (101 miles) Stage 11 from Carcassone to Montpellier

Juan Medina/Reuters

Riders are seen in silhouette as they cycle through the countryside on the Tour de France cycling race 162.5 km Stage 11 from Carcassone to Montpellier on Wednesday

Athletes leave the start at the men's half marathon final during the European Athletics Championships in Amsterdam, the Netherlands

Vanden Wijngaert/AP

Athletes leave the start at the men’s half marathon final during the European Athletics Championships in Amsterdam, the Netherlands

reat Britain's Andy Murray kisses the trophy as he celebrates winning the mens singles final against Canada's Milos Raonic at Wimbledon

Tony O'brien/Reuters

reat Britain’s Andy Murray kisses the trophy as he celebrates winning the mens singles final against Canada’s Milos Raonic

A participant rides through a pool of water during the Monsoon Scooter Rally in Mumbai, India

Shailesh Andrade/Reuters

A participant rides through a pool of water during the Monsoon Scooter Rally in Mumbai, India

Mercedes' Lewis Hamilton celebrates with fans after winning the 2016 British Grand Prix.

Matthew Childs/Reuters

Mercedes’ Lewis Hamilton celebrates with fans after winning the 2016 British Grand Prix

Cycling - Tour de France cycling race - Stage 7 from L'Isle-Jourdain to Lac de Payolle

Juan Medina/Reuters

Team Dimension Data rider Stephen Cummings of Britain wins, on 162.5 km Stage 7 from L’Isle-Jourdain to Lac de Payolle, of the Tour de France on Friday

A combination of images show the grass surface of Centre Court at the All England Lawn Tennis and Croquet Club during the Wimbledon Tennis Championships in London

Stefan Wermuth/Reuters

A combination of images show the grass surface of Centre Court at the All England Lawn Tennis and Croquet Club during the Wimbledon Tennis Championships on every day from June 27 to July 8 in London, Britain 2016. The Wimbledon Tennis Championships is the only Grand Slam tournament that is played on grass, a surface that wears over the course of the two week competition.

France Cycling Tour de France Mechanical Doping

AP Photo/Peter Dejong

UCI official checks the riders bicycles for mechanical doping prior to the start the sixth stage of the Tour de France cycling race over 190.5 kilometers (118.1 miles) with start in Arpajon-sur-Cere and finish in Montauban, France, on Thursday

Britain Wimbledon Tennis

AP Photo/Kirsty WigglesworthAngelique Kerber of Germany returns to Venus Williams of the U.S during their women's singles match on day eleven of the Wimbledon Tennis Championships in London, on Thursday