Draper, 23, stunned four-time major champion Alcaraz with a 6-1 0-6 6-4 victory in a dramatic Indian Wells semi-final.

The British number one, who served out the match at the second attempt, will move into the world’s top 10 for the first time in his career as a result.

The pivotal moment of a bizarre match came when England’s Draper was rescued by video technology in the third game of the deciding set – and went on to break Alcaraz’s serve.

With the score at 1-1, and the game 15-15 on Alcaraz’s serve, the ball was adjudged by umpire Mohamed Lahyani to have bounced twice before Draper reached a drop shot.

It was clearly a wrong call from the official, but players now have the benefit of using video technology in Indian Wells to challenge decisions over double bounces.

After Draper instantly asked for a replay, his challenge was successful and allowed Lahyani to overturn the original decision.

He was given the point for a 15-30 lead and, with momentum back in his favour, secured a break which ultimately proved the difference.

The left-hander goes on to face Denmark’s Holger Rune in Sunday’s final at the Masters 1000 event.

Rune, ranked 13th in the world, reached the fourth Masters final of his career with a 7-5 6-4 victory over Russian fifth seed Daniil Medvedev.

Meanwhile, Britain’s Olivia Nicholls missed out on a first WTA 1000 title after losing in the Indian Wells women’s doubles final.

Nicholls, 30, and her Slovakian partner Tereza Mihalikova were beaten 6-2 7-6 (7-4) by Dutch player Demi Schuurs and Asia Muhammad of the United States.

Nevertheless, it has been another productive week for the pair, who have formed a strong partnership since linking up last May.

Nicholls has already becoming Britain’s leading women’s doubles player and, after competing in her first final at the level below the Grand Slams, will climb to a career-high 31st place in the world rankings.