MARTINA HINGIS, SANIA MIRZA Doubles Watch FREE U.S. Open Live Stream Online & Listen: Live Coverage, Queens

Today at 3:00 p.m. ET Martina Hingis, 34, will team with popular Indian player Sania Mirza in the U.S. Open women's doubles quarterfinals as No. 1 seeds, an impressive feat considering Hingis is ancient by tennis standards.