Serena Williams won 10 games in a row to defeat countrywoman Vania King and reach the third round of the US Open.

The world No.1, who is bidding to win a third straight title at Flushing Meadows, needed just 56 minutes to triumph 6-1, 6-0.

Williams, who was wearing a shocking pink leopard-print dress, said: "It's so hard to play in the wind. I'm really happy to get through a solid match with the conditions today."

The 32-year-old next meets Varvara Lepchenko, her third successive American opponent.

Ana Ivanovic became the second top-10 player to crash out as she fell 7-5, 6-4 to Czech Karolina Pliskova in round two.

Victoria Azarenka looked much sharper than in her first-round match, winning 12 of the last 14 games in a 6-3, 6-2 victory over America's Christina McHale.

Eleventh seed Flavia Pennetta, a semi-finalist last year, made smooth progress with a 6-4, 6-3 victory over America's Shelby Rogers.