Cameron Norrie vs Dino Prizmic — R128 — Cincinnati Open

Break points did the separating. Norrie converted three of his four while Prizmic took one of five, including an 0-for-4 in the deciding set. Then the serve stopped covering the 21-year-old Croatian. His first-serve points won fell from 86 percent in the opener to 44 in the second, where Norrie broke in game 2 for 2-0 and again in game 6 for 5-1, and one more break, in game 7 for 4-3, decided the third. Prizmic out-hit him 25 winners to 14 and 11 aces to three and still lost. Norrie held 11 of 12 service games and closed inside 1 hour, 51 minutes, a steadier start in Cincinnati than the Round of 16 exit that ended his week in Canada.