Serena Williams (L) of U.S. and Roger Federer of Switzerland take a selfie after their historically first mixed doubles match at the Hopman Cup in Perth, Australia, January 1, 2019.

Peru's Lucas Barron (L), the first co-driver with Down Syndrome, takes part in the Dakar Rally next to his father and driver Jaques Barron (R) at the Dakar Rally in Lima, Peru, January 6, 2019.

With his daughter and son, Tom Brady (C) of the New England Patriots talks on the podium after his team's victory at the Super Bowl LIII in Atlanta, U.S., February 3, 2019.

Wang Shuang lifts a "Come on China" banner after the Chinese national women's football team defeat Cameroon 1-0 to win the Four-Nation Tournament in Wuhan, central China, April 7, 2019.

American golfer Tiger Woods celebrates winning the Masters at Augusta National Golf Club in Augusta, U.S., April 14, 2019.

Belgian cyclist Victor Campenaerts celebrates breaking the UCI hour world record with a distance of 55.089 km cycled in an hour at the Aguascalientes Bicentenary Velodrome in Mexico City, Mexico, April 16, 2019.

Chinese badminton player Chen Yufei clenches her fist and yells in celebration after winning a Sudirman Cup final match in Nanning, south China, May 26, 2019.

The team bus of the UEFA Champions League winners Liverpool travels past fans during their homecoming victory parade in Liverpool, UK, June 2, 2019.

A referee (C) lifts the arm of Yan Xiaonan (L) to announce the Chinese MMA fighter's fourth consecutive win in the UFC after defeating American Angela Hill in Chicago, U.S., June 8, 2019.

Ashleigh Barty holds tight of her trophy next to the sign of Roland Garros to celebrate becoming the first Australian winner at the French Open since 1973, in Paris, France, June 9, 2019.

The St. Louis Blues celebrate their first NHL championship after defeating the Boston Bruins during the Stanley Cup Finals in Boston, U.S., June 12, 2019.

Kawhi Leonard #2 of the Toronto Raptors celebrates his team's victory over the Golden State Warriors in Game Six to win the 2019 NBA Finals in Oakland, U.S., June 13, 2019.

Qin Liang, first Chinese referee during the 2019 FIFA Women's World Cup, gives instructions during the match between England and Argentina in Le Havre, France, June 14, 2019.

Rhythmic gymnast Dina Averina of Russia performs her ribbon routine during an individual all-around competition on her way to win the gold medal at the European Games in Minsk, Belarus, June 22, 2019.

One of the world's top seven paramotor flyers, in competition at the Tianmenshan Int'l Paramotor Stunt Masters, tries to land during the X-sport tournament in Zhangjiajie, central China, June 27, 2019.

American players celebrate winning the FIFA Women's World Cup in Lyon, France, July 7, 2019.

Sun Yang of China celebrates on the podium after winning the men's 400m freestyle final at the FINA World Championships in Gwangju, South Korea, July 21, 2019.

Team Ineos' Colombian rider Egan Bernal (L) leads the peloton passing by Louvre Pyramid during the Tour de France final stage in Paris, France, July 28, 2019.

Rudy Fernandez lifts the trophy as Team Spain win the FIBA World Cup final against Argentina, the country's first title since 2006, in Beijing, China, September 15, 2019.

China's top spiker Zhu Ting (L) and coach Lang Ping celebrate after winning the FIVB Women's Volleyball World Cup with 11 unbeaten matches in Osaka, Japan, September 29, 2019.

Kenya's Eliud Kipchoge celebrates after a successful attempt to run a marathon in under two hours in Vienna, Austria, October 12, 2019.

American gymnastics star Simone Biles gestures at the Artistic Gymnastics World Championships women's vault event during which she wins the gold medal in Stuttgart, Germany, October 12, 2019.

Rafael Nadal of Spain lifts his ATP world No.1 trophy after winning the ATP Finals in London, UK, November 15, 2019.

China's only boxing world champion Xu Can (C) retains his WBA featherweight world title for the second time after defeating American boxer Manny Robles III in Indio, U.S., November 23, 2019.

Guangzhou Evergrande's players and Italian manager Fabio Cannavaro (C) celebrate after winning the Chinese Super League for the eighth time in Guangzhou, south China, December 1, 2019.

Lionel Messi of Argentina and Barcelona enjoys the special moment of his sixth Ballon d'Or award in Paris, France, December 2, 2019.

China's Sui Wenjing (L) and Han Cong celebrate after winning the ISU Grand Prix of Figure Skating Final pairs short program in Turin, Italy, December 6, 2019.

Ding Junhui of China wins the snooker UK Championship for the third time in York, UK, December 8, 2019.

Mercedes' British racer Lewis Hamilton wins the F1 Grand Prix of Abu Dhabi, wrapping up the season with 11 wins after the last stop in UAE, December 11, 2019.

William Buffey of Canada competes in the men's big air event during the FIS Freestyle Snowboard World Cup at Shougang Park in Beijing, China, December 12, 2019.