Williams ready to step up

Serena Williams: Plenty of work to do in the second week

Serena Williams knows she has to up her game in the second week of Wimbledon if she is to lift her fifth Venus Rosewater dish.

Williams defeated Barbora Zahlavova Strycova and Melinda Czink in the early stages of the tournament but the 30-year-old had to dig deep to see off 25th seed Jie Zheng in the third round on Saturday.

Williams lost the first set but recovered to move into the last 16 and set up a meeting with Yaraslava Shvedova, who claimed a 'Golden Set' against Sara Errani, winning the opener 6-0 without dropping a point.

But with Petra Kvitova and Victoria Azarenka awaiting Williams en route to the final, the 13-time grand slam winner knows she must improve in order to progress.

"I have to make sure I do better," she said. "Usually I return well but I hit so many errors off my returns against Zheng. I still think I can play better."

The first thing on Williams' mind when facing Shvedova will be to succeed where Errani failed.

"Hopefully I'll be able to win a point in the first set! That'll be my first goal, and I'll go from there," she joked.

Shvedova has lost the only meeting between the two players three years ago in straight sets, and this is the first time she has made the fourth round at SW19.

Most of Shvedova's success to date has come in doubles, but her win over Errani has left Williams wary.

Good player

"She's a really good player and she's playing well," added Williams. "She does everything really well. She's a solid player.

Williams will play Shvedova first on Court Two on Monday, while rival and world No 1 Maria Sharapova will book her place in the quarter-finals if she beats 15th seed Sabine Lisicki.

Kvitova takes on Francesca Schiavone in the hope of making her second quarter-final at the tournament, while second seed Azarenka takes on Ana Ivanovic on Centre Court.

Agnieszka Radwanska faces Camila Giorgi and Kim Clijsters will be hoping her Wimbledon finale does not come to an end when she plays Angelique Kerber.