Roberto Bautista Agut of Spain hits a backhand return to Grigor Dimitrov of Bulgaria during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Aijaz Rahi)
Grigor Dimitrov of Bulgaria hits a backhand return to Roberto Bautista Agut of Spain during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Aijaz Rahi)