Grigor Dimitrov has advanced to his first Grand Slam quarterfinal in his 14th attempt after beating Roberto Bautista Agut 6-3, 3-6, 6-2, 6-4 at the Australian Open on Monday.
Dimitrov, who beat No. 11 Milos Raonic in the third round, will play either top-ranked Rafael Nadal or Kei Nishikori in the last eight on Wednesday. He clinched the match by breaking Bautista Agut's serve for the fourth time.
The 22-year-old Bulgarian's breakthrough win came on the same day his girlfriend, Maria Sharapova, lost her fourth-round match to Dominika Cibulkova.