Germany’s Kerber celebrates with the trophy after winning her final match against Williams of the U.S. at the Australian Open tennis tournament at Melbourne Park

Germany's Angelique Kerber celebrates with the trophy after winning her final match against Serena Williams of the U.S. at the Australian Open tennis tournament at Melbourne Park, Australia, January 30, 2016. REUTERS/Jason Reed

Germany’s Angelique Kerber celebrates with the trophy after winning her final match against Serena Williams of the U.S. at the Australian Open tennis tournament at Melbourne Park, Australia, January 30, 2016. REUTERS/Jason Reed