Siegemund and Zvonareva triumph in Cancun for fourth title of the year
No.6 seeds Laura Siegemund and Vera Zvonareva charged through the field in Mexico to capture the GNP Seguros WTA Finals Cancun doubles title, wrapping up the week with a 6-4, 6-4 victory over No.8 seeds Nicole Melichar-Martinez and Ellen Perez in Monday's final.
