Mees Rottgering vs Tomas Machac — R32 — Winston-Salem Open

The No. 14 seed came in carrying a 66 percent implied chance with the betting market and was broken in the opening game of the match. Machac never repaired the serve, dropping it three times behind seven double faults and a first ball that landed 33 percent of the time. Ranked 418th, Rottgering held nine of his ten service games and won 24 of 36 points off the second serve he was handed. He broke again in game 11, watched the seed save a match point in game 12, and settled it in the tiebreak at 1h 43m. It is the best win by opponent ranking on his record, one round after he beat 77th-ranked Choinski, and it puts him in the Winston-Salem round of 16.