Two-time defending champion Carlos Alcaraz is bracing for a tough semi-final test from "ambitious" British lefty Jack Draper on Saturday as he aims to take the next step toward a rare Indian Wells ATP Masters three-peat.

Jack Draper beats Ben Shelton on a cold and blustery evening in Indian Wells to set up a tantalising semi-final against Carlos Alcaraz.

British No.1 tennis star Jack Draper has reached the Indian Wells semi-finals with a superb 6-4 7-5 victory over American star Ben Shelton. The 23-year-old is now set for a mouth-watering showdown with Wimbledon and French Open champion Carlos Alcaraz in the last four.

Draper had already beaten Americans Jenson Brooksby and Taylor Fritz, in addition to topping rising star João Fonseca of Brazil in his opening round.