Gallery: US Open day two

The defending champion is out, but both of the top seeds are safely through. Rain might have dampened the action at Flushing Meadows on day two, but the new roof on Arthur Ashe ensured that at least a modicum of play continued. These are the best photos from the second day of the US Open.

: “I’m happy with the match – it was exciting” – Roger Federer after the match. Photo: Getty Images

: Tiafoe won plenty of fans during his gutsy performance against the world No.3. Photo: Getty Images

: Roger Federer sealed an epic 4-6 6-2 6-1 1-6 6-4 in two hours 37 minutes over Frances Tiafoe. Photo: Getty Images

: Federer looked to have the match in his hands before Tiafoe hit back in the fourth. Photo: Getty Images

: Roger Federer was far from his best during the match against Tiafoe. Photo: Getty Images

: Sean Connery wasn’t impressed with what he saw from Roger. Photo: Getty Images

: Posh Spice in the house! Sean Connery wasn’t impressed with what he saw from Roger. Photo: Getty Images

: Madison Keys was a 6-3 7-6(6) winner over Elise Mertens. Photo: Getty Images

: Keys made the perfect start to her campaign. Photo: Getty Images

: Naomi Osaka produced a stunning display to upset defending champion Angelique Kerber. Photo: Getty Images

: Kerber has now lost seven times in the opening round in 2017. Photo: Getty Images

: Osaka overwhelmed the German, securing a 6-3 6-1 win. Photo: Getty Images

: Kerber’s wretched form in 2017 continued with her exit to Osaka. She is projected to drop to No.12 in the world. Photo: Getty Images

: Rafael Nadal was a straight sets winner over Dusan Lajovic. Photo: Getty Images

: After a slow start, Nadal came through 7-6(6) 6-2 6-2 in little over two hours. Photo: Getty Images

: Photo: Getty Images

: Despite benefitting from the roof, Rafa was unhappy at the noise on Arthur Ashe because of it. Photo: Getty Images

: Karolina Pliskova was in ominous form, dismissing Magda Linette 6-2 6-1. Photo: Getty Images

: Jelena Ostapenko’s match was moved to Ashe because of the rain, the Latvian eventually winning 6-2 1-6 6-1. Photo: Getty Images

: Barbora Strycova was one of the few winners on the outside court, coming through 6-1 6-3 against Misaki Doi. Photo: Getty Images