Remember when he was utterly invincible, the most perfect tennis player ever back around February 2007?
* Then he shows up at Indian Wells on a 41 match winning streak and inexplicably loses to Canas in 2 sets. Ok, it was a blister, so that explained it...
* Then he shows up at Miami and is very shaky to get to R4 and loses again to Canas, blowing a lead in the 3rd set. Both forehand/backhand misfiring.
* Loses badly to Nadal in Monte Carlo and then loses to Volandri in Rome.
* Beats Nadal in Hamburg and temporarily we all think Federer is back in full form.
* Beats Nadal in Wimbledon, but backhand looks shaky, bailed out by superhuman serving(21 aces)
* Loses to Djokovic in Montreal, after blowing 6 set points
* Wins Cincinatti but groundstrokes look terrible
* Wins US Open, but backhand continues to look very vulnerable, especially topspin drive backhand is seriously misfiring
* Loses Madrid final to Nalbandian when his forehand starts misfiring badly again
* Wins TMC with pretty good overall form, Fed fans think the worst is over and TMF is back
* Mono strikes in December 2007, destroys Federer's winter training
* Plays horrible tennis from Australia all the way to French Open, just terrible all around
* Wins Halle showing great form, never broken once
* Looks pretty shaky getting to Wimbledon final in straight sets(but lots of shanking) and loses memorable final to Nadal in darkness
* Continues horrid, listless play through Olympics
* Wins US Open in shakiest form ever, somehow forehand was firing again in the semis/final
* terrible indoor season, back injury
* Pretty good run to AO final, backhand looking good again but Nadal dismantles Federer again in 5 sets, questions begin again
* Horrific play in IW/Miami/Monte Carlo/Rome, Shankerific
* Wins Madrid Open against Nadal showing excellent form the last few matches
* Currently in FO final in shakiest slam form ever
So the big question is what happened between Feb 07 and spring 07 that made Federer descend from JesusFed to NormalFed? That was the single biggest decline IMHO.