Pegula broke for 2-1 and again for 5-2, dominant in taking the set 6-2, with Cîrstea's sole break for 2-2 a brief interruption.
Cîrstea broke for 4-4 and again for 6-4, rallying from 0-2 down to seize the set, Pegula's deuce holds for 2-0 and 3-1 insufficient.
Pegula broke for 5-4 and again for 6-5, then held for 7-5 in a 9 minute deuce game, surviving Cîrstea's resilient 5 minute hold for 3-2 saving both break points.