Italy’s Flavia Pennetta routed world No.3 Agnieszka Radwanska 6-2 6-1 on Sunday to win the Indian Wells WTA crown.

Pennetta, 32, claimed the biggest title of her career, needing just one hour and 13 minutes to blow past Poland’s second-seeded Radwanska, who was troubled by a left leg injury.

Pennetta’s victims in the $US12 million ($A13.35 million) combined WTA and ATP Masters tournament included world No.2 and top seed Li Na of China as well as former US Open champion Samantha Stosur.

Pennetta claimed the 10th WTA title of her career and her first since Marbella in 2010. Since then Pennetta had battled through an injury-plagued 2012 season, dropping as low as 166th in the world.

She was considering retirement before reaching the semi-finals of the US Open last year.