Gallery: The best of US Open day one

The first day of a Grand Slam always feels a bit like the first day of school. Who’s wearing what? Who is playing well? Who’s going to be the first big player to fall down? Johanna Konta is the answer to the last of those questions, the rest are still being decided. In the meantime, enjoy some of the best photos from Day 1 of the US Open.
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: It was gone 2am when Alexander Zverev wrapped up a 7-6(9) 7-5 6-4 win over Darian King. Photo: Getty Images

: Alexander Zverev had a frustrating start to his US Open campaign. Photo: Getty Images

: Zverev went for a Bjorn Borg circa 1980s look. Photo: Getty Images

: Sharapova looked stunned after securing the win, and later cried on the court. Photo: Getty Images

: Halep could still become world No.1 despite the defeat to Sharapova. Photo: Getty Images

: Sharapova secured a stunning 6-4 4-6 6-3 win in an enthralling match on opening night. Photo: Getty Images

: Maria Sharapova has divided opinion since her return to tennis. Photo: Getty Images

: Maria Sharapova made her much-awaited return to Grand Slam action against Simona Halep. Photo: Getty Images

: Shania Twain opened the Arthur Ashe night session with a blockbuster performance. Photo: Getty Images

: Garbine Muguruza made it look easy against Varvara Lepchenko, winning 6-0 6-3. Photo: Getty Images

: The Wimbledon champion is hunting down the third leg of a career Grand Slam at the US Open. Photo: Getty Images

: Marin Cilic looked a little bit rusty during his 6-4 6-3 3-6 6-3 win over Sandgren. Photo: Getty Images

: Caroline Wozniacki needed nearly two hours to put away Buzarnescu 6-1 7-5. Photo: Getty Images

: Venus Williams was forced to dig deep during her 6-3 3-6 6-2 win over Viktoria Kuzmova (who had never won a main draw match before). Photo: Getty Images

: It’s a bit like this for Bernard Tomic at the moment. The Aussie lost in four to Gilles Mulller. Photo: Getty Images

: Ash Barty roared back against 21st seed Ana Konjuh, winning 4-6 6-0 6-1. Photo: Getty Images

: Stan might not be there, but Donna Vekic still managed to get a 6-2 6-1 win over Haddad Maia. Photo: Getty Images

: Denis Istomin came close to beating Albert Ramos-Vinolas, but ultimately went down in five. Photo: Getty Images

: Johanna Konta was the first big name to bite the dust, beaten in three by Aleksandra Krunic. Photo: Getty Images

: David Ferrer left an already wide open quarter even wider as he went out in four sets to Kukushkin. Photo: Getty Images