British number one Johanna Konta has been knocked out of the Miami Open in the fourth round by three-time champion Venus Williams.

Defending champion Konta, ranked 14th, won the first set but eventually lost 5-7 6-1 6-2.

The 26-year-old had beaten world number eight Williams in straight sets in the semi-finals 12 months ago.

Williams, 37, will play Monica Puig of Puerto Rico or fellow American Danielle Collins in the quarter-finals.

Konta saved set point to turn the first set – which lasted just over an hour – in her favour and take the early advantage.

But Williams, a 10-time Grand Slam singles champion, cruised through the second set to even the score, with Konta requiring a medical timeout before the deciding set.

The Briton hit three aces in a row to save a break point in the third set, but Williams continued her dominant comeback to serve for the match.

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Elsewhere, US Open champion Sloane Stephens eased past Spanish third seed Garbine Muguruza to reach the last eight.

American Stephens – seeded 13th – wrapped up a 6-3 6-4 victory in one hour and 28 minutes.

Germany’s Angelique Kerber joined Stephens in the quarter-finals after defeating Yafan Wang of China 6-7 (1-7) 7-6 (7-5) 6-3, while Belarusian Victoria Azarenka beat Agnieszka Radwanska of Poland 6-2 6-2.

Fourth seed Elina Svitolina of Ukraine also advanced with a 7-5 6-4 win over Australian Ashleigh Barty, as did Czech Republic’s fifth seed Karolina Pliskova after Zarina Diyas of Kazakhstan retired hurt while trailing 6-2 2-1.