WTA roundup: Four lower seeds triumph in Sao Paulo quarters

(Photo credit: Robert Deutsch-Imagn Images)

Friday was a day for the underdogs in Sao Paulo, as all four lower-seeded players vanquished their foes in the quarterfinal matches of the SP Open.

Mexican fifth seed Renata Zarazua, who sent Madison Keys home in first round of the U.S. Open last month, knocked off top-seeded Brazilian hopeful Beatriz Haddad Maia, 7-6 (5), 6-3 in a two-hour, 15-minute match. Zaraz