Sixth-ranked Samantha Stosur of Australia opened her 2011 season with a 7-6 (1), 6-1 win over Lucie Hradecka of the Czech Republic in the first round of the Brisbane International on Monday. The top-seeded Stosur took almost 90 minutes to overcome qualifier Hradecka, coming back from 4-1 down in the first set to set up a second-round meeting with compatriot Jarmila Groth. Eighth-ranked Andy Roddick, the men's second seed, served five aces and one double fault, spending 72 minutes on court in his 6-3, 6-2 win over Australian wild card Marinko Matosevic. Roddick dominated on serve against his 138th-ranked opponent, winning 77 percent of service points and taking advantage of four of six break points. He said later he felt under no pressure to defend the Brisbane title he won last year when he beat Radek Stepanek in the final. "More so the pressure is always to use this tournament to get me ready for Melbourne. It worked last year so I'm going to do it again this year," Roddick said. Stosur had eight aces and converted five of nine break points, steadily improving as the match progressed. Read more: http://sports.espn.go.com/sports/tennis/news/story?id=5983497