Originally Posted by ultradr
Federer's serve, the absolute best in this era, is control oriented one but not as overpowering as other great servers of 90's in highly specialized era.
His serve is better than most of the biggest servers of the 90s. Probably not Sampras but certainly a fair few.
Big servers were aided considerably by the generally much faster conditions. If you put Federer in the 90s his ace count and second serve potency would go through the roof.
Point: people love to play the "the conditions were faster back then" card looking at only one side of the coin - omitting to consider how it could positively
affect -sometimes significantly - current players if they were magically transported back to the 90s. Similarly, if Sampras was playing nowdays - his service winner count would be halved, not only by speed but the significantly leaps in average serve return ability.