Roger Federer has told Carlos Alcaraz that he must be aware of his ‘physical capabilities’. The Swiss star is widely regarded as one of the best tennis players to ever grace the court, and Alcaraz is viewed as the heir to his throne after a sensational few seasons.

Roger Federer has nothing but praise for Carlos Alcaraz's game but the tennis legend has noticed one thing that he believes the 21-year-old needs to change going forward because it could potentially have a negative impact on his health and ultimately career.

Last week, Roger Federer was in Berlin for the Laver Cup, and he watched Alcaraz live, as the Spaniard sealed a straight-set win over Ben Shelton, and then beat Taylor Fritz as Team Europe secured their victory.

After storming to success so early in his career, tennis icon Roger Federer has dished out some essential advice to Carlos Alcaraz so that the Spaniard can sustain his form