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ROTTERDAM, Netherlands | Top-seeded Roger Federer defeated Juan Martin del Potro 6-1, 6-4 Sunday to win the ABN Amro World Tennis for his first title of the year. The Swiss star was making his first appearance in Rotterdam since winning the 2005 title. Del Potro, seeded third, was playing in the tournament for the first time.

c Top-ranked Victoria Azarenka shook off a lingering ankle injury to win the Qatar Open, routing Sam Stosur of Australia 6-1, 6-2. Azarenka earned her 17th straight victory and first title since replacing Caroline Wozniacki atop the rankings after winning the Australian Open. It was her third title overall in 2012.

c From wire dispatches and staff reports