Murray , the sixth seed , edged the opening set 6 - 4 .
Dimitrov forged a 6 - 3 lead in a second set tiebreaker and eventually closed it out 7 - 5 to level the match .
Murray , the sixth seed , edged the opening set 6 - 4 , but Dimitrov forged a 6 - 3 lead in a second set tiebreaker and eventually closed it out 7 - 5 to level the match .