Roger Federer and Rafael Nadal are both out of the world's top four for the first time in 13 years

The changing of the guard in world tennis was confirmed on Monday as both Roger Federer and Rafael Nadal fell out of the top four for the first time in 13 years.
The legendary rivals, who have won 31 Grand Slam titles between them during their careers, have been mainstays in the sport for well over a decade.
But respective injury problems and decline in form have finally caught up with the dynamic duo.
Federer, who has been sidelined since Wimbledon due to a knee injury, has fallen down to seventh in the new rankings.
Nadal, who has not claimed a Grand Slam title since 2014, has fallen down... read more