Sharapova ousted in Montreal
Maria Sharapova was eliminated from the Rogers Cup in Montreal after being beaten 6-2 4-6 6-2 by Carla Suarez Navarro.
No 14 seed Navarro emerged victorious in the third round clash despite a second-set fightback from Sharapova and a nerve-testing final-set rain delay.
The French Open champion was playing her first event since a surprise fourth-round exit at Wimbledon and has now suffered another setback ahead of the US Open.
Suarez Navarro raced through the first set and went a break up in the second, but Sharapova reeled off four straight games to level the match.
The Spaniard responded by edging ahead in the decider and although the rain break gave the underdog plenty of time to think about the situation, on the resumption Sharapova failed to mount a comeback.
Sharapova committed a grand total of 49 unforced errors during the match.
Another shock on Thursday saw second seed and newly-crowned Wimbledon champion Petra Kvitova beaten 6-4 1-6 6-2 by Ekaterina Makarova.
Kvitova, who like Sharapova has not played any competitive tennis since Wimbledon, paid the price for inconsistent play and will not be able to regain the title she won in 2012.