The 27-year-old Indian had earlier won the Australian Open (2009) and the French Open (2012) mixed titles."
New York, Sep 5 - India's Sania Mirza and Brazilian Bruno Soares beat American-Mexican pair Abigail Spears and Santiago Gonzalez in the final to win the US Open mixed doubles title here Friday.
Sania, who had faced defeat only a day earlier losing the women's doubles semifinals, bounced back brilliantly to win her third Grand Slam title.
The top seeds won 6-1, 2-6, 11-9 in super tie-break in a see-saw match lasting an hour at the Arthur Ashe Stadium.
After winning the first set decisively, Sania and Soares stumbled dramatically in the second, taking the match into a super tie-break.
The topsy-turvy nature of the match continued as the top seeds let go of a 9-4 lead to let their opponents tie the scores at 9-9.
In the end, however, the Indian-Brazilian pair, who have been so impressive in the entire tournament, held on to win two consecutive points to take home the title.
The 27-year-old Indian had earlier won the Australian Open (2009) and the French Open (2012) mixed titles.
Her best performance in the women's doubles was when she reached the final of the French Open.