Former world number one Ana Ivanovic is trying to recapture her old form, easing past China's number 21 seed Zheng Jie on Wednesday in the US Open second round.

The 22-year-old Serb, who won the French Open in 2008, needed less than an hour to dispatch Zheng 6-3 6-0 in sweltering conditions on Arthur Ashe.

Ivanovic has suffered from a lack of form over the last two seasons but has recently started a gradual climb up the world rankings and was far too strong for former Wimbledon semi-finalist Zheng.

Ana Ivanovic of Serbia celebrates after defeating Zheng Jie of China during the U.S. Open tennis tournament in New York, September 1, 2010.

Using her powerful forehand to good effect, Ivanovic raced out into a 5-1 lead in the first set before Zheng briefly hit back with a break of serve of her own.

However, Ivanovic held her nerve and eventually closed out the opening set before going on to completely dominate the second.

It's kind of out of Ivanovic's expectation to go through Zheng in this way. "I was really happy with today's game, because she's tough opponent and I lost to her last couple of times we played. I was expecting really tough match," said the unseeded Serbian.

"Actually conditions a little bit tough out there because it was very gusty. I played and just stayed aggressive. Even when errors crept in, I just kept looking for the ball that I knew I had to hit. It worked out well."

【体坛英语资讯：Former No.1 Ivanovic romps past Chinas Zheng】相关文章：

★ 体坛资讯：China win sixth Sudirman Cup title

★ 体坛英语资讯：CBA struggling to find TV audience

★ 体坛英语资讯：No problems after Ronaldo operation - surgeon

★ 体坛英语资讯：Football fans express support for earthquake victims

★ 体坛资讯：China race into Sudirman Cup final

★ 体坛英语资讯：Li Na Sharapova march on

★ 体坛英语资讯：Argentine celebrity Maradona could carry Olympic torch

★ 体坛英语资讯：Wang ready to bounce back in 2008

★ 体坛英语资讯：Extra-time goals lift Russia into semifinals

★ 体坛英语资讯：Seattle guard Durant named Rookie of the Year