![Carlos Alcaraz, youngest-ever ATP world number one 'still has untapped potential'](https://cdn.thinkwebcontent.com/articles/33448/4x3/33448-1663086999--PprEbr-carlos-alcaraz-winningUSOpentobecomeATPnumberone-EFE.jpg)
Carlos Alcaraz, youngest-ever ATP world number one 'still has untapped potential'
MURCIA-BORN tennis teen Carlos Alcaraz's epic US Open win has catapulted him to world number one – the youngest in history – but his trainer has a chilling warning for his future rivals.