That's easy:
Fed's peak: 2004-2007
Fed's prime: 2003-2009
Similar to most open era tennis greats before him like Sampras, Lendl etc.
The real mystery is when did Nadal peak? All these years on this forum I have yet to get a straight answer out of any of his fans.
And no saying, middle of 2008, first 2 months of 2009, 2nd half of 2010 isn't a straight answer LOL.
Unfortunately, there are two key issues in the case of Rafa which make pointing out a peak difficult. The first issue is the fact that Rafa has evolved as a tennis player in surfaces out of clay differently obviously than in clay. The second is the obvious problem with injury. It's too bad he hasn't had a relatively free injury career (compared with Fed, for example). However it's no use lamenting that fact, as i see it as a direct consequence of his style of play.
That's your opinion, many will disagree. Regardless, one doesn't have to be exclusive to the other, it might be a combination of Fed declining and Nadal improving.
Yes, it could be. My point is that you need to take into account the quality of the opposition as yet another very important factor.
As far as I'm concerned, not necessarily, for example I feel Fed's highest level of play was in 2005 despite the fact that statistically 2006 was a better year (even 2007 if you value slams above anything else).
But what makes you feel that way is the level of play that Fed sustained, right? The way he won matches?
And they also depend on the level of Federer.
Of course.
Yeah, but if for example if we presume (for the sake of the argument, not saying you personally do) Federer from 2008+ as a lesser opponent than a 2004-2007 Fed then your point would apply in that case as well.
Yes, it's relative. Relying on results alone is not a good guide, I think play is more important. Also, results can be deceiving. Take for example USO last year. Fed lost in the semi, but could it have gotten any closer to a victory for him?
Let's see, in 2008 Fed:
-got destroyed by Mardy Fish (who was serving 30% 1st serves in)
-lost to Karlovic for the first time ever
-lost to Blake for the first time ever
-lost to Stepanek for the first time ever
-lost to Roddick for the first time after 5 years
-went into USO that year without having a single HC final (let alone a title) under his belt
-was on the brink of losing in early rounds at both AO and USO
etc. etc.
So are those guys challenging opponents against Fed? How come they weren't so before 2008? I guess it was a collective improvement on their behalf while Fed remained the same?
No. In this case Occam's Razor dictates Fed went into a rough patch.
You offer very good arguments, and I don't disagree with them basically. I guess my point applies more to the previous section of Fed's career (up to 2008). I just feel he wasn't tested remotely as much (for example) during his first 7 slam run.
Also, do you think Fed steadily declined in Wimbledon from 2006 to 2008, or do you think it's Nadal's improvement in grass that can be the main contributor to this?
Fed from 2010 to now is clearly in decline though, no doubt about it. The fact that he just won Wimbledon is simply amazing, and a part of me wants to see him take a few more (with Nadal subsequently breaking that record a few years later, of course).