Diana Shnaider vs Maja Chwalinska — R32 — Cincinnati Open

Return games decided this, and not in the direction the raw chances point: Diana Shnaider drew 20 break points and cashed four, while Maja Chwalinska saved 16 of them and stretched the match to 3 hours and 45 minutes. In the second set alone, the 22-year-old left-hander went 2 for 13 on break chances. Shnaider broke in game 7 for 3-4, then again in game 9 for 5-4. The lead lasted one game. Chwalinska broke straight back in game 10 for 5-5 and saved the only match point she faced, before the tiebreak went the other way. It is Shnaider's first win over the 24-year-old Pole on record, reversing the French Open semifinal she lost in June, and nearly four hours of it buys a round-of-16 place at the Cincinnati Open with no set dropped all week.