Agnieszka Radwanska takes place in Kids Day activity on day two of the Sydney International on Monday.

Agnieszka Radwanska takes place in Kids Day activity on day two of the Sydney International on Monday. Photo: Getty Images

Agnieszka Radwanska is upfront with her strategy to stop the Serena Williams juggernaut: hit as much as possible with the men.

Radwanska, who launches her title defence as top seed at the Sydney International on Tuesday, is one of the craftiest players on tour, unravelling her rivals more with touch and angles than all-out power.

But the world No.5 admits conquering powerhouses such as Williams and the other three players above her in the rankings - Australian Open champion Victoria Azarenka, Maria Sharapova and Li Na - requires more brute strength.

Such is why her support team is more a boys' club.

''I have couple of hitting partners - they're guys, so of course, they're playing stronger than the girls,'' the Polish glamour girl said on Monday. ''So of course the practice always a little bit harder and you do much more in practice to be prepared good for the match.

''It's always what I'm trying to do, but every match is different story, especially different conditions and on the different surface.''

Radwanska, 23, who took Williams to three sets in the 2010 Wimbledon final, is the only one of the top five playing a tournament the week before the season's first grand slam.

''Well, the past two months, I didn't play any matches,'' she said.

''I played in Czech, the league like I'm playing every year, but matches are different than the practice.

''It's always a good challenge, especially in the beginning of the year. You see where the form is.''

AAP