Bethanie Mattek-Sands beat United States Fed Cup teammate Melanie Oudin 6-1, 6-4 Tuesday in the opening round of the Rogers Cup in Montreal.

Mattek-Sands won key singles and doubles matches back-to-back to lead the Americans to a 3-2 win over Russia in the Fed Cup semifinals earlier this year and she maintained that form against Oudin.

44th ranked Oudin seemed to struggle with her 2nd serves in particular during the match.

Mattek-Sands improved to 4-0 in her career against 18-year-old Oudin, who reached the U.S. Open quarterfinals in September.