Dakar Rally - 2018 Peru-Bolivia-Argentina Dakar rally - 40th Dakar Edition stage four, San Juan de Marcona to San Juan de Marcona - January 9, 2018. Competitors in action.

Tennis - Kooyong Classic - Kooyong Lawn Tennis Club, Melbourne, Australia, January 10, 2018. Serbia's Novak Djokovic stretches for a shot during his match against Austria's Dominic Thiem.

Alpine Skiing - FIS Alpine Skiing World Cup - Women's Slalom - Flachau, Austria - January 9, 2018 - Mikaela Shiffrin of the U.S. celebrates with trophy.

Alpine Skiing - FIS Alpine Skiing World Cup - Women's Slalom - Flachau, Austria - January 9, 2018 - Resi Stiegler of the U.S. in action.

Dakar Rally - 2018 Peru-Bolivia-Argentina Dakar rally - 40th Dakar Edition stage four, San Juan de Marcona to San Juan de Marcona - January 9, 2018. Cyril Despres of France and copilot David Castera of France.

Tennis - Australian Open - Melbourne Park, Melbourne, Australia, January 10, 2018. Spain's Rafael Nadal reacts during a practice session ahead of the Australian Open tennis tournament. REUTERS/David Gray - RC1DBE6E9DB0

Dakar Rally - 2018 Peru-Bolivia-Argentina Dakar rally - 40th Dakar Edition stage four, San Juan de Marcona to San Juan de Marcona - January 9, 2018. Nasser Al-Attiyah of Qatar and Matthieu Baumel of France try to move their stuck Toyota.

Tennis - Australian Open - Melbourne Park, Melbourne, Australia - January 10, 2018 - Switzerland's Roger Federer reaches for a ball during a practice session ahead of the Australian Open tennis tournament.