Second seed Daniil Medvedev came through in straight sets against Germany’s Dominik Koepfer at Flushing Meadows

Novak Djokovic survived a scare to beat Danish qualifier Holger Rune at the US Open and move a step closer to the grand slam

Fourth seed Karolina Pliskova opened her US Open challenge with a straight-sets victory over the American teenager Caty McNally

Sloane Stephens beat Madison Keys in a repeat of the 2017 US Open final as Simona Halep and Garbiñe Muguruza also survived tough openers

Third seed Stefanos Tsitsipas survived a huge scare in the opening round of the US Open to see off Andy Murray in five sets

Novak Djokovic and Ash Barty have been handed tough draws in New York, where the Serb is aiming to clinch the grand slam