Originally Posted by kylebarendrick
Don't put too much faith in exhibitions. Players are supposed to look good in those. The idea that someone who retired 10 years ago could play a competitive match against the world number 1 is dubious at best.
Perhaps, but looking very respectable against the world #1 counts for something even if Federer did not give his full effort.
Sampras is still quite fit and his serve probably has not declined very much. I would be very surprised if he could not give lower ranked ATP players all they could handle on fast courts.
In fact, 7 years ago or so I watched a 45ish McEnroe beat clearly frustrated 30-year old Philipoussis, who had only been retired for less than two years at that point.