There were also a few exchanges with chair umpire James Keothavong and flashes of brilliance, typically, as the 25th seed broke back to level the third set when it seemed Berdych had begun to coast towards the finish line.
But the consistent Czech veteran crossed it safely enough, to get back to where he so often has. The quarterfinals. Again. The winner of 13 career titles is unsure how long he will continue to play, but is confident he will know the right time to depart.
"As long as I'm healthy, then I think I can be still competitive way enough, which this one proves me that 100 per cent,'' Berdych said.
"So as long as I'm able to keep myself really fit, then I'm going to go as far as I can. I don't put any goals or any predictions if it's gonna be a year, two, or if it's going to be after what I'm achieved or not or things like that.
"Really, my basic thing is or basic goal is just to have fun. Just to have joy from the tennis. If one day I'm going to wake up and I say, 'all right, that's it', then that's it."