Kamilla Rakhimova vs Maria Sakkari — R64 — Cincinnati Open

Neither serve was safe; the return games decided it. Sakkari broke eight times from 19 chances and held eight of her own 13, while Rakhimova, converting five of 12, ran out of returns first — broken in games 2, 4 and 6 of the decider. Her one sustained stretch came in the second, a break in game 11 for 6-5 that she served out, though the five aces Sakkari struck in that set bought nothing. Two hours and 49 minutes on, the 29th seed has won all three of their meetings on record, every one of them going the distance.