Why the serve has become the limiting factor in Carlos Alcaraz's pursuit of tennis greatness — and his journey to making it a weapon.

Draper, 23, was beaten 6-4 6-4 as world number three Alcaraz battled valiantly to save break points at key moments and take his own chances when they came.

Third seed Carlos Alcaraz overcame a nervy start to beat Briton Jack Draper 6-4 6-4 on Wednesday and reach the Italian Open semi-finals for the first time. Four-times Grand Slam champion Alcaraz, who is gearing up to defend the French Open title later this month,