Second-seeded John Isner hit 16 aces to reach the quarterfinals of the Open de Nice in France in a tight all-American contest with Steve Johnson. Isner sealed a 7-6 (3), 4-6, 6-3 victory in a match of nearly two hours against the 55th-ranked Johnson.
The No. 8 seed, Juan Monaco, also made it to the quarterfinals by breaking Sam Querrey five times in a 6-3, 6-1 win.
u25a0 Marin Cilic, the United States Open champion, saved a match point against Andrey Rublev, a 17-year-old Russian, before winning, 4-6, 7-6 (7), 6-1, in the second round of the Geneva Open in Switzerland.