Coco Gauff, Naomi Osaka and Taylor Fritz are the tennis stars playing in the third round of the US Open on Saturday. Follow along for live updates.

Madison Keys could barely believe what had just happened. After holding a commanding 5-0 lead in the deciding set against Qinwen Zheng, the American watched the match slip completely away, eventually throwing her racquet in frustration after suffering one of the most dramatic defeats of her US Open career.

Former finalists Taylor Fritz, Amanda Anisimova and Madison Keys crash out of US Open - Madison Keys lost seven games in a row and squandered a match point as she lost in three sets

By Amy Tennery NEW YORK, Sept 5 (Reuters) - China's Zheng Qinwen came back from 5-0 down in the deciding set to beat American Madison Keys 1-6 7-6(3) 7-5 in the U.S. Open third round on Saturday as she battles back from a chronic right elbow injury that has stunted her career.

Last year's runner-up Amanda Anisimova faces Anastasia Potapova for a place in the US Open fourth round - listen to live commentary.

Zheng revealed she was sick just before beating teenage sensation Kristina Liutova in the US Open first round.

Filipino star cruises into round 3 at Flushing Meadows, as Zheng survives three-set battle and Felix Auger-Aliassime wilts in New York heat.