Maria Sakkari vs Robin Montgomery — R128 — US Open

Down two breaks at 3-0 in the second set, Sakkari broke back in game 6 for 2-4, broke again in game 8 for 4-4, and closed the set with a third break in game 12. The unforced errors turned with it. Montgomery, a qualifier ranked 187th, sprayed 24 unforced errors in that second set and 14 more in the third, while Sakkari won 92% of her first-serve points in the decider and made three errors all set. The American out-hit the 32nd seed 23 winners to 16 and took five of nine break points to Sakkari's five of 13, but 47 unforced errors to 27 settled it. It ran two hours and 12 minutes, and Sakkari moves on at the US Open with her hard-court year at 8-7.