Agnieszka Radwanska wary of Li Na

Poland's Agnieszka Radwanska questions a line call in her first round match at the Australian Open tennis championship on January 13, 2013
© AP Photos
Agnieszka Radwanska insists she will not take Li Na lightly when the pair square off for a place in the Australian Open semi-finals tomorrow.

Agnieszka Radwanska has insisted that she will have to be at her best to stand a chance of beating Li Na when the pair square off in the Australian Open quarter-finals tomorrow.

The Polish number one has been in impressive form at Melbourne Park, cruising into the last eight with a comfortable win against Ana Ivanovic on Sunday.

Radwanska beat Li on the way to winning the Sydney International earlier this month but believes that her Chinese opponent will provide the biggest test of her tournament to date.

She told reporters: "It's always tough against her. She's always playing very solid tennis.

"I think I really have to play aggressive against her, definitely serving good, really playing my hundred percent best tennis.

"Otherwise I'm not going to win. She's a very consistent player and moving very well. I think in our matches it's not about the power on the serve."

The fourth seed has not dropped a single set in her last 13 competitive matches.

China's Li Na celebrates after defeating Sorana Cirstea in the third round of the Australian Open tennis championship on January 18, 2013
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