Last year's men's singles runner-up Alex Zverev triumphed in straight sets in his first round match at the US Open ©Getty Images

Picture Gallery

Women's top seed Ashleigh Barty was taken to a tiebreak in the second set during her first round win against Vera Zvonareva ©Getty Images
Women's top seed Ashleigh Barty was taken to a tiebreak in the second set during her first round win against Vera Zvonareva ©Getty Images
David Goffin of Belgium, the 27th seed, was surprisingly beaten in straight sets by home player Mackenzie McDonald ©Getty Images
David Goffin of Belgium, the 27th seed, was surprisingly beaten in straight sets by home player Mackenzie McDonald ©Getty Images
Women's singles gold medallist from Tokyo 2020 Belinda Bencic won in straight sets in her opening round match ©Getty Images
Women's singles gold medallist from Tokyo 2020 Belinda Bencic won in straight sets in her opening round match ©Getty Images
Men's singles runner-up at the 2014 US Open Kei Nishikori won in four sets against Salvatore Caruso in his first round match ©Getty Images
Men's singles runner-up at the 2014 US Open Kei Nishikori won in four sets against Salvatore Caruso in his first round match ©Getty Images
Fourth seed Karolina Pliskova of the Czech Republic triumphed in straight sets in her first round encounter in New York ©Getty Images
Fourth seed Karolina Pliskova of the Czech Republic triumphed in straight sets in her first round encounter in New York ©Getty Images
Amanda Anisimova was among the American players to win during the day session on day two of the US Open ©Getty Images
Amanda Anisimova was among the American players to win during the day session on day two of the US Open ©Getty Images
Fans have to provide evidence they have had at least one coronavirus jab to be able to attend the US Open ©Getty Images
Fans have to provide evidence they have had at least one coronavirus jab to be able to attend the US Open ©Getty Images