STUTTGART (AFP) - French Open finalist Samantha Stosur of Australia continued her impressive run of form at Stuttgart's WTA tournament by winning the doubles with partner Sabine Lisicki on Sunday. The pair enjoyed a 6-1, 7-6 (7/5) win over Germany's Kristina Barrois and Jasmin Woehr in the final and Stosur walks away with a winners cheque of 35,020 US dollars. In the singles tournament, the 27-year-old knocked out second-seed Vera Zvonareva in the last eight, but lost the semi-final to local favourite Goerges. Stosur is expected to move up to the ranking of sixth in the world when the WTA rankings are next released.