Kazakhstan's Elena Rybakina serves to Japan's Naomi Osaka during the women's singles round of 16 tennis match on day nine of the US Open.
Zheng Qinwen pulled off another US Open stunner Monday, beating Iga Swiatek to book a quarter final with Elena Rybakina as men's top seed Alexander Zverev advanced safely to the last eight.
It was one more gritty comeback for Zheng, the Paris Olympics gold medallist and a former world number four now ranked 121st after struggling in the wake of elbow surgery last year.
Zheng had won the last seven games, saving a match point, as she shocked Madison Keys in her previous match.
After falling behind 5-0 in the first set against six-time Grand Slam champion Swiatek she again reeled off seven straight games.
