John Isner never had a break-point opportunity but he won anyway to advance to the last 16 at the Miami Open.
The big American hit 16 aces as he edged Felix Auger-Aliassime 7-6 (5) 7-6 (5) in the third round on Sunday.
That made it four consecutive sets Isner has won by tiebreaker against Auger-Aliassime in Miami.
In the rematch, neither player had a break point, which meant the outcome was determined by a handful of shots.
“I enjoy it when I win,” Isner said.
“It’s frustrating when you lose a match that comes down to point here or there, and a lot of times that’s how it is for me. I could very easily be talking now as a loser and be going home.”
World No.12 Roberto Bautista Agut rallied past Jan-Lennard Struff 4-6 6-3 6-2 to set up a fourth round clash with Isner.
“I’m going to have to play well if I’m going to have any chance of beating him,” Isner said.