Zheng wins set from 5-0 down again to stun Swiatek

Zheng Qinwen won a set from 5-0 down for the second match in succession as she extended her fantastic US Open run by beating former champion Iga Swiatek to reach the quarter-finals.

Swiatek, who received treatment to her left thigh when leading 2-1 in the second set, had entered the US Open in excellent form by winning the WTA 1000 event in Toronto and getting to the semi-finals in Cincinnati, while she had progressed through to round four without dropping a set.

Swiatek 'started making mistakes' after fast start For Swiatek, 25, a fourth-round exit is a disappointing end to her Grand Slam season, with a quarter-final appearance at the Australian Open her best result.