Clijsters keen to raise game for semis in Melbourne

Kim Clijsters is confident of producing the improved performance she feels is required to beat Vera Zvonareva in the Australian Open semi-finals tomorrow.

The Belgian overcame Agnieszka Radwanska 6-3 7-6 (7/4) today to join Zvonareva in the last four and set up a rematch of last year’s US Open final which Clijsters won convincingly.