Key Biscayne - John Isner erased the only break point he faced on Tuesday and outlasted Milos Raonic in a serving duel at the Miami Open, 6-7 (3), 7-6 (6), 7-6 (5).
Isner, seeded 22nd, is the only American left in the men's draw. With the win, he advanced to the Key Biscayne quarterfinals for the first time.
Isner, who has yet to lose serve in three matches, was down two mini-breaks in the second-set tiebreaker before he rallied. He hit 22 aces to 12 for Raonic, with a top speed of 143 mph.
The No 5-seeded Raonic netted a backhand on the final shot of the match. Isner won 116 points, Raonic 115.Results on Tuesday from the eighth day of the ATP and WTA Miami Open(x denotes seeded player):
Tomas Berdych (CZE x8) bt Gael Monfils (FRA x17) 6-3, 3-2, retired, right hip injury
Dominic Thiem (AUT) bt Adrian Mannarino (FRA x28) 7-6 (7/5), 4-6, 7-5
Juan Monaco (ARG) bt Fernando Verdasco (ESP x29) 6-3, 6-3
Andy Murray (GBR x3) bt Kevin Anderson (RSA x15) 6-4, 3-6, 6-4
David Ferrer (ESP x6) bt Gilles Simon (FRA x12) 7-6 (7/5), 6-0
Kei Nishikori (JPN x4) bt David Goffin (BEL x18) 6-1, 6-2
Novak Djokovic (SRB x1) bt Alexandr Dolgopolov (UKR) 6-7 (3/7), 7-5, 6-0
John Isner (USA x22) bt Milos Raonic (CAN x5) 6-7 (3/7), 7-6 (8/6), 7-6 (7/5)
Andrea Petkovic (GER x9) bt Karolina Pliskova (CZE x14) 6-4, 6-2
Carla Suarez Navarro (ESP x12) bt Venus Williams (USA x16) 0-6, 6-1, 7-5