Dino Prizmic vs Tommy Paul — R64 — US Open

Serving for the match in game 9 of the fourth, Paul was broken back for 4-5, which fit the pattern: Prizmic converted three of his five break points, Paul six of 16, and the 21-year-old Croatian had already run out the third with breaks in games 11 and 12. Then Paul served his way clear. He made 80 percent of his first serves, won 50 of 59 points behind them and hit nine aces to two — against the grain for an American who usually wins the long ones with his legs and his return. Prizmic, who had needed five sets in the opening round, saved a match point and nine of 16 break points, and won 72 percent of his first-serve points while finding only 40 percent of them, eight double faults included. Three hours and three minutes on, the 20th seed is into the third round at the US Open.