Roger Federer has advanced to the third round of the US Open, beating Bosnian Damir Dzumhur 3-6, 6-2, 6-3, 6-4.
The 38-year-old third seed, who also dropped the first set against Indian qualifier Sumit Nagal in his opener, overcame a slow start to win the rain-affected match.
Japanese seventh seed Kei Nishikori has also progressed after eliminating American Bradley Klahn 6-2, 4-6, 6-3, 7-5.
Meanwhile, two-time women’s champion Venus Williams has crashed out following a 4-6, 4-6 defeat to fifth seed Elina Svitolina.
Elsewhere, Czech third seed Karolina Pliskova ousted 202nd-ranked Georgian qualifier Mariam Bolkvadze 6-1, 6-4.

India's Iyer taken to hospital after fielding injury
Norris unfazed by crowd boos after winning in Mexico
Mbappe and Bellingham strike as Real Madrid edge Barcelona 2-1 in fiery El Clasico
Brazilian teen Fonseca beats Fokina to win biggest career title in Basel
Arsenal go clear after win over Palace, Man City slip up at Villa
