Ivanovic is out to be No 1

MONTREAL: World No 1 Ana Ivanovic battled her way into the third round of the Montreal Cup to keep her nose in front in the fight for the top ranking on Wednesday.

No 3 Maria Sharapova, however, will take no further part after withdrawing from the tournament with a shoulder injury following her win over Poland's Marta Domachowska.

Playing her first event since a shock third-round exit at Wimbledon, Ivanovic arrived with her top ranking under serious threat from fellow Serb Jelena Jankovic and Sharapova.