Del Potro sends Grand Slam title warning to Nadal and Federer: 'Djokovic can catch you'

JUAN MARTIN DEL POTRO has warned Rafael Nadal and Roger Federer that Novak Djokovic can catch them in the all-time Grand Slam title list after he won the US Open.

from Daily Express :: Tennis Feed https://www.express.co.uk/sport/tennis/1015273/Del-Potro-Grand-Slam-title-warning-Nadal-Federer-Djokovic-US-Open
via Express