Johanna Konta upset third seed Simona Halep 3-6 7-6 (9-7) 6-2 to become the first British woman to reach the semi-finals of the Miami Open.

Konta, the 10th seed, constructed a comeback over two and a half hours to send the favoured Romanian out in the last-eight struggle.

The Brit was on the verge of being knocked out when – after breaking Halep in the 10th game of the second set to force a tie-break – she found herself 5-3 down.

However, three points in quick succession swung things back in Konta’s favour and she levelled up the match at a set each.

The pair combined for 13 double-faults over the course of the afternoon, with Konta breaking for 3-2 in the final set to move into position for victory.

Konta will face the winner of the quarter-final between top seed Angelique Kerber and American veteran Venus Williams.

Caroline Wozniacki and Karolina Pliskova will meet in the other semi-final.