Wta monterrey

The US Open: Renata Zarazua staged an upset at The US Open by beating Australian Open champion Madison Keys to reach the second round.

The Mexican had scored her first ever Top 10 triumph with a gruelling 6-7(10), 7-6(3), 7-5 scoreboard to down No. 6 seed Keys.

Zarazua fell in six previous attempts against Top 10 talents, but secured a career-best result in three hours and 10 mins to book a Round 2 rumble with France’s Diane Parry.