A fired-up Serena Williams sent out a warning to the young pretenders of women's tennis when she powered to a crushing 6-1, 6-3 victory over world No.1 Victoria Azarenka to win the Madrid Open on Sunday.

The 30-year-old former No. 1 made the most of Azarenka's nervous start on the blue dirt of the Manolo Santana show court to race into a 4-0 lead.

After breaking the Belarussian's serve for a third time to clinch the first set, Williams turned the screw with another break early in the second and clinched victory on her first match point. Roger Federer matched Rafael Nadal's record of 20 Masters titles when he fought back from a set down to beat Tomas Berdych 3-6, 7-5, 7-5 in a gripping singles final.

The Swiss maestro, who will also climb above his great rival Nadal to No. 2 in the world when the rankings are updated, secured his fourth title of the season with a gritty display on the blue clay at the futuristic Magic Box arena.

The results: Men: Singles: Final: Roger Federer bt Tomas Berdych 3-6, 7-5, 7-5. Women: Singles: Final: Serena Williams bt Victoria Azarenka 6-1, 6-3.

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