There's a precedent. Heard of Peyton Manning who had multiple neck surgeries and came back to win Super Bowl while being accused of using HGH (Human Growth Hormone) at age 102 about the same age Federer is operating @ now.
He has defeated Nadal - twice - straight. You can just stop there and it should be enough to prove the accusation.
Oh, you want more?
6 mo hiatus.
Just the 'first' tournament after return.
THREE five setters. One of them against Nadal in the freaking final where Nadal had FAR more pain than pleasure on the line than Federer.
Defeated Nadal in straight sets within weeks.
Nadal is in 'full flight' given the 'conditions'.
There was 'justifiable' reason for Federer to resort to 'cheating' considering what was on the line specially with respect to Nadal AND Djokovic.
Has reached two finals in three tournaments. And that's two of the most difficult ones: Slam and Masters 1000.
And that's when other top cats have done Jack except Nadal and he has been had by Federer like never before.
Nadal defeated Federer @ AO final for his lone AO title after completing a five plus hour semifinal against Verdasco. THEN he defeated Federer in another 12 hour five setter. THAT'S when Federer had a near cake walk at his draw. AND another thing: Federer was in his SUPER prime.
THIS time Federer was not only NOT in his prime, he was returning after FIRST surgery of his life that placed him on the shelf for six months. Not enough? Federer had already competed @ TWO five setters before completing the third one against NADAL, of all the freaking people. More? He was down a break in the FIFTH freaking set, yet he came back and defeated - once again - NADAL.
The sequence is unprecedented in the history of tennis.
Oh, what did you say? It's a coincidence? You freaking kidding me!!!!!!!!!
And this accusation is solidifying, heck solidified, when he has won JUST one tournament. If he wins Indian Wells after defeating some clown from Spain again, you think the PED company that supplied him the 'goods' will freaking start releasing ads with Federer as their spokesman considering there will be nothing left to lose AND hide then - other than cashola, that is.
What if he wins Roland Garros? Do you want me to add the second part too? Are you sure? OK, after defeating that bald clown who picks his behind - that we know of. Too much? OK, forget that, how about if he wins Wimbledon - WITHOUT defeating that clown?
There's NO freaking way out ALREADY. However, if Federer continues to win - with or without Nadal's participation - you can bet your card board box that you call home that Federer will get tainted far beyond the landscape he 'deserves'.