Serena Williams "focused" for Maria Kirilenko clash

Serena Williams celebrates her second round win on January 17, 2013
© AP Photos
Serena Williams says that she must be "focused" in order to overcome Russia's Maria Kirilenko in the fourth round of the Australian Open.

Serena Williams has said that she will have top be on top form to defeat Maria Kirlienko in the fourth round of the Australian Open.

The American has not yet dropped a set in Melbourne, but said that she must be "focused" against the 14th seed if she is to make the last eight.

"Maria [Kirilenko] is playing consistent tennis, especially the past 16, 18 months, she's been so consistent," said Williams. "So my goal is just to be really focused against such a player that's doing so well."

Williams was asked about a potential final against in-form Maria Sharapova, but stopped short of making any bold predictions.

"She's playing great," she added. "I think she's doing everything well.

"I have to get there. I have three more matches to win. I can't worry about that right now. I just have to take everything a step at a time."

The world number three has lifted the title in Melbourne on five previous occasions - the last coming in 2010.

Britain's Andy Murray serves to Ricardas Berankis during their third round match at the Australian Open tennis championship on January 19, 2013
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2Spain Rafael Nadal7,555
3Switzerland Roger Federer7,145
4Switzerland Stanislas Wawrinka5,780
5Serbia Novak Djokovic5,325
6Croatia Marin Cilic5,155
7Alexander Zverev4,470
8Austria Dominic Thiem4,030
9Japan Kei Nishikori3,285
10Canada Milos Raonic3,230
11Bulgaria Grigor Dimitrov3,070
12France Jo-Wilfried Tsonga2,770
13Belgium David Goffin2,560
14Spain Roberto Bautista Agut2,425
15Czech Republic Tomas Berdych2,390
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20United States Sam Querrey2,060