Samantha Stosur is through to the third round of the Cincinnati Masters thanks to a straight-sets win over American wildcard Jamie Hampton.

The 11th-seeded Australian triumphed 6-3 7-6 (7-3) on Wednesday, needing one hour and 42 minutes to account for the world No.26.

Stosur will next face either eight-seeded Frenchwoman Marion Bartoli or Romanian Simona Halep.

With the US Open starting in 11 days, Stosur will be hoping to continue her hardcourt build-up to the grand slam tournament she won in 2011.

The 29-year-old lifted the Southern California Open title two weeks ago in Carlsbad.