Venus Williams upsets world No. 1 Angelique Kerber at Miami Open

The American joins Johanna Konta in the Miami Open semifinals after knocking off the No. 1 player in the world.

Venus Williams overcame world No. 1Angelique Kerber to set up a Miami Open semifinal against Johanna Konta.

Williams, bidding for her 50th WTA Tour title, reached the last four with a hard-fought 7-5, 6-3 win over Kerber on Wednesday.

The American seven-time Grand Slam champion broke Kerber's serve five times on her way to the semifinals.

Williams, also a three-time winner in Miami, and Kerber traded breaks twice in the first set before the 11th seed claimed the decisive one in the 12th game.

Although she was broken in the opening game of the second set, Williams rolled out to a 4-1 lead before sealing her win.

KONTA WINS HALEP BATTLE

Awaiting Williams is No. 10seed Konta, who upset Simona Halep 3-6, 7-6 (9-7), 6-2 after 2 1/2 hours.

The Romanian No. 3 seed dominated from the baseline early before Konta fought back, a rollercoaster tie-break going the Brit's way.Konta took the momentum into the third and from 2-1 down powered through the final five games.

She holds a 2-1 head-to-head record over Williams, including winning their two matches last year.

By using Yahoo you agree that Yahoo and partners may use Cookies for personalisation and other purposes