Fabian Marozsan vs Michael Zheng — R128 — Cincinnati Open

Break points, and who cashed them, decided this one. Zheng converted three of four chances while Marozsan managed two of six, including 0-for-3 in a third set that produced no break at all. The middle set is where the qualifier built it, breaking in game 4 for 3-1 and again in game 6 for 5-1; the 61st-ranked Marozsan's 12 aces to seven counted for little behind a 40 percent first-serve rate and a 66-to-84 deficit in first-serve points won. The betting market had made Zheng the 57 percent favorite despite the ranking gap, and the 22-year-old American — 2-5 on hard this season, beaten in his last two — needed 1 hour 53 minutes to end that slide.