Sam Stosur of Australia defeated Agnieszka Radwanska of Poland 6-2, 5-7, 6-2 to reach the final of the Rogers Cup on Saturday. Stosur broke Radwanska three times in the first set, but the Pole rallied to take the second when Stosur double-faulted. The Australian broke Radwanska to go up 5-2 in the third, then won the match with an ace. The loss snapped a nine-match winning streak for Radwanska, who claimed her fifth WTA title last week in Carlsbad, California. The 11th-ranked Stosur will face either Serena