Serena Williams overcame an injury scare to beat Petra Martic in straight sets and book her place in the US Open quarter-finals.
The 37-year-old suffered an ankle injury midway through the match and wad forced to have a medical timeout to address the problem.
But the American refused to let the injury get in the way of her quest for a 24th Grand Slam title and she wrapped up a 6-3, 6-4 victory over the Croatian in one hour and 32 minutes.
Williams played down the severity of the incident in her on-court interview but admitted her recent problems with injuries affected her mentality.
"I just rolled it, I don't know why. I was volleying and it just went over," she said.
"That was a little frustrating but I wanted to get it compressed really fast so that's what I did [with the medical timeout].
"It affected me a little mentally because I've had a rough year with injuries and I thought 'Oh my god, not again! I'm finally walking' but thanks to you guys [addressing the crowd I got through it."
Williams, into her 16th quarter-final at Flushing Meadows, will face Qiang Wang in the last eight after she shocked world number two Ashleigh Barty in straight sets.
