Jiri Lehecka vs Matteo Berrettini — R64 — Cincinnati Open

Twenty-two unforced errors in the second set, a tiebreak lost with them, and the ninth seed had handed back an opener built on a break in game 3 for 2-1. The serve never cracked, though. Lehecka held all 15 of his service games and wiped away every one of the four break points he faced, while Berrettini went 0 for 4 on return and had no second tiebreak to reach for. The one opening that mattered came in game 4 of the third, a break for 3-1, and it held up across two hours and 22 minutes in a matchup with no prior meetings on record.