Del Potro: Draper can compete with Sinner, Alcaraz but needs his body to respond

Former Grand Slam champion Juan Martin del Potro has backed Jack Draper to compete with Jannik Sinner and Carlos Alcaraz but admits he needs "confidence in his body".

Draper has been tipped as a future Grand Slam contender but the real journey for the British star is about consistency, fitness, and handling expectations on the biggest stages, according to Del Potro - the 2009 US Open champion.