Roger Federer's departure from tennis has raised the question of retirement of the other two members of the revered "Big Three" but Novak Djokovic has assured that he does not feel "old enough" to consider bringing down the curtain yet.
Federer's decision was not unexpected given the 41-year-old's recent struggles with injuries and form, but it was still met with an outpouring of sadness by fans and former players when the Swiss great bid an emotional goodbye to the sport.
