The world women's tennis number three Maria Sharapova's participation in next week's Beijing Olympics hinges on a scan on her right shoulder.
The injury forced the Russian to withdraw from the Montreal Cup despite a 7-5 5-7 6-2 win over Poland's Marta Domachowska yesterday.
Playing her first match since a shock second-round defeat by compatriot Alla Kudryavtseva at Wimbledon in June, Sharapova twice received treatment on her shoulder during her three-hour match in Montreal.
Sharapova says her shoulder has been troubling her since she played at Indian Wells, California in March.
