Abigail Speers of the US and Juan Sebastian Cabal, left, of Colombia hold their trophy after defeating Sania Mirza, second right, and Ivan Dodig, right, in the mixed doubles' final...

Spain's Rafael Nadal, left, and Switzerland's Roger Federer stand together ahead of the men's singles final at the Australian Open tennis championships in Melbourne, Australia.

Spain's Rafael Nadal celebrates after winning a point against Switzerland's Roger Federer during the men's singles final at the Australian Open tennis championships in Melbourne, A...

Switzerland's Roger Federer kisses his trophy after defeating Spain's Rafael Nadal in the men's singles final at the Australian Open tennis championships in Melbourne, Australia.

Switzerland's Roger Federer reacts after breaking the serve of Spain's Rafael Nadal during the men's singles final at the Australian Open tennis championships in Melbourne, Austral...

Switzerland's Roger Federer, right, is congratulated by Spain's Rafael Nadal after Federer won the men's singles final at the Australian Open tennis championships in Melbourne, Aus...

Switzerland's Roger Federer holds his trophy aloft after defeating Spain's Rafael Nadal during their men's singles final at the Australian Open tennis championships in Melbourne, A...

Switzerland's Roger Federer holds his trophy after defeating Spain's Rafael Nadal during the men's singles final at the Australian Open tennis championships in Melbourne, Australia...

Switzerland's Roger Federer waves while holding his trophy after defeating Spain's Rafael Nadal in the men's singles final at the Australian Open tennis championships in Melbourne,...

Switzerland's Roger Federer, right, holds his trophy with Rod Laver after defeating Spain's Rafael Nadal, left, in the men's singles final at the Australian Open tennis championshi...

Japan's Yui Kamiji celebrates after winning her women's wheelchair singles final against Wiske Griffioen of the Netherlands at the Australian Open tennis championships in Melbourne...

India's Sania Mirza, left, celebrates with Ivan Dodig, second left, of Croatia after winning their mixed doubles' semifinal against Australia's Samantha Stosur and Sam Groth at the...

United States' Venus Williams celebrates after defeating compatriot Coco Vandeweghe during their semifinal at the Australian Open tennis championships in Melbourne, Australia.

United States' Serena Williams celebrates after defeating Croatia's Mirjana Lucic-Baroni during their semifinal at the Australian Open tennis championships in Melbourne, Australia.

Switzerland's Roger Federer celebrates after defeating compatriot Stan Wawrinka during their semifinal at the Australian Open tennis championships in Melbourne, Australia.

Spain's Rafael Nadal makes a forehand return to Canada's Milos Raonic during their quarterfinal at the Australian Open tennis championships in Melbourne, Australia.

Switzerland's Roger Federer celebrates after defeating Germany's Mischa Zverev during their quarterfinal at the Australian Open tennis championships in Melbourne, Australia.

Switzerland's Stan Wawrinka makes a backhand return to France's Jo-Wilfried Tsonga during their quarterfinal at the Australian Open tennis championships in Melbourne, Australia.

United States' Venus Williams celebrates after defeating Russia's Anastasia Pavlyuchenkova during their quarterfinal at the Australian Open tennis championships in Melbourne, Austr...

Switzerland's Martina Hingis hits a backhand as partner India's Leander Paes watches during their mixed doubles match against Croatia's Nikola Mektic and Brian Baker of the United ...