Tommy Paul vs Hubert Hurkacz — R64 — Cincinnati Open

Two games into the decider, Paul broke for 2-0, and that single swing held up because the nine break points he faced across two hours and 36 minutes all ended the same way — saved, with all 16 of his service games intact. Hurkacz struck 19 aces to Paul's one and still never won a return game, going 0 for 9 on the chances he manufactured. The Pole had taken their most recent meeting at Wimbledon in July; the American's third-set first-serve edge, 70 percent to 63, answered it and moved him to 3-1 in meetings on record.