Federer, 36, won his 20th Grand Slam pretension when he took a Australian Open pretension final month.
It meant a Swiss good has now won 3 of a past 4 Slams he has entered.
Federer’s form over a past 13 months has spectacularly finished a empty spell where he went 17 Slams though winning one.
But he certified this week that he suspicion he might have won his final vital due to Andy Murray, Novak Djokovic and Rafael Nadal.
Federer said: “A year and a half ago we had asked if this [20 Grand Slams] was probable and we said: ‘that is not going to happen’.
“I had not won any Grand Slam for sp long. Andy (Murray) and Novak (Djokovic) were tip and we also saw Rafael (Nadal) lapse to level. One was okay, though we did not design this.”