Spectators watch the second round match between Kei Nishikori of Japan and Dusan Lajovic of Serbia at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014. (AP Photo/Shuji Kajiyama Shuji)
Maria Sharapova of Russia hits a forehand return to Karin Knapp of Italy during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Aaron Favila)