Federer currently has 19 Grand Slams to his name after winning the Australian Open and Wimbledon in 2017.

Nadal is Federer’s nearest challenger and he ensured the gap stayed at just three by winning the French and US Open.

At 36, Federer’s hopes of finishing on an insurmountable number are slim although he is the early favourite to win the Australian Open next month.

While Nadal, who is still the dominant player on clay, has more years to overtake Federer as long as his knees remain healthy.