Magdalena Rybarikova

15-year-old saves two match points against Polona Hercog as fairytale run continues

That’s six sets for two matches so far and sweetly into the third round for Djokovic

The Dane – who has previously been world number one – has never won a major title

American contenders Venus Williams, Stephens and Vandeweghe all bow out

Venus Williams also through at US Open as sister Serena gives birth to a baby girl

The American dispatched Johanna Konta while Muguruza thrashed Rybarikova

Five-time Wimbledon champion will meet Johanna Konta in Thursday’s semi-finals

Caroline Wozniacki and Agnieszka Radwanska also get through tricky ties