The Hitch said:
But the main point of my post is that Nadal keeps to his peak for a while, while Federer can string half his carreer onto one single peak.
While this is true, I think there are some moderating factors:
- Nadal relies primarily on his physical qualities rather than shot making ability - his low risk strategy relies on strength (to continually hit the amount of top spin required to give him the margin for error he needs) and endurance - this strategy does not give quick resolution to points and games. Hence when his physical level drops a little bit he falls in mundane 6-4 6-4 defeats - see Del Potro v Nadal USO 2009, Sod v Nadal FO 2009, Murray v Nadal USO 2008, Toronto 2010.
- I don't think anyone would disagree Federer's shot making ability and anticipation are superior to Nadal's. Federer plays shorter points that are less demanding on his body, and has less to recover from than Nadal. I wouldn't say Fed has superior ability to recover than Nadal.
- For a long period (2004 - 2007), Federer arguably faced opposition of a standard lower than the current crop of top 10 players. Federer's streak should be seen in that context (i.e. its not as impressive as people make it out to be)
- Someone pointed out their records in 5 set matches as a sign that Nadal is more likely to be doped than Fed. Nadal success in these matches may partly be due to his endurance, but also his superior (mental) ability to play big points. This is certainly not one of Fed qualities - when he does win a 5 set match, its often due to his opposition being too scared to beat him (i.e. choking) - see Haas FO 2009, Falla Wimbledon 2010.
There is probably a high likelihood that many, most, or all in the top 10/50 are doped given the lax standard of testing in tennis and only seem to be caught when customs officers find vials of HGH in their luggage, but I would expect the nature and extent of their preparation varies from player to player substantially given the huge diversity in the way the game can be played.