Anyone who thinks a prime Agassi would have beaten a prime Federer more than maybe 2 out of 10 times is seriously on something.
This highlight reel pretty much says it all :
http://www.youtube.com/watch?v=-WWQZ306dqw
Usually highlight reels are not good sources of evidence. But when you can come up with that many highlights in a match that lasted less than 2 hours, you know it was a total exhibition show.
Agassi has three things over Federer on the backhand :
1. A better driving backhand
2. More consistent
3. Better at attacking the serve off this side. Not necessarily better at returning.
Federer has these over Agassi on the backhand :
1. Can hit winners at will in defensive positions
2. Has every shot known to man off this side, topspin, flat, slice, lob, etc.
3. Can create angles just as well as Agassi, and in some cases, even better ones.
4. Sets up points better from this side than Agassi; Agassi normally bludgeons you with his backhand.
5. Far better defensively on this side than Agassi. Can slice to get back into the point, hit winners in defensive positions, hit great lobs, etc.
6. Gets more balls into play on the return.
I would take Federer's backhand during his "prime" any day of the week.
Sampras v. Federer 2001 Wimbledon
Sevice Statistics
Aces 26
25
Double Faults 9 6
1st Serve Percentage 69% (132/189)
62% (113/181)
1st Serve Points Won 76% (101/132)
82% (93/113)
2nd Serve Points Won 45% (26/57)
51% (35/68 )
Break Points Saved 78% (11/14)
81% (9/11)
Service Games Played 29 29
Statistics on Return
1st Return Points Won 17% (20/113)
23% (31/132)
2nd Return Points Won 48% (33/68 )
54% (31/57)
Break Points Won 18% (2/11)
21% (3/14)
Return Games Played 29 29
Statistics on Points
Total Service Points Won 67% (127/189)
70% (128/181)
Total Return Points Won 29% (53/181)
32% (62/189)
Total Points Won 48% (180/370) 51% (190/370)
Sampras v. Agassi 1999 Wimbledon
Sevice Statistics
Aces 16
5
Double Faults 5 6
1st Serve Percentage 66% (76/114)
44% (49/109)
1st Serve Points Won 89% (68/76)
75% (37/49)
2nd Serve Points Won 39% (15/38 )
45% (27/60)
Break Points Saved 100% (4/4)
66% (6/9)
Service Games Played 16 15
Statistics on Return
1st Return Points Won 24% (12/49)
10% (8/76)
2nd Return Points Won 55% (33/60)
60% (23/38 )
Break Points Won 33% (3/9)
0% (0/4)
Return Games Played 15 16
Statistics on Points
Total Service Points Won 72% (83/114)
58% (64/109)
Total Return Points Won 41% (45/109)
27% (31/114)
Total Points Won 57% (128/223) 42% (95/223)
I bolded the parts I compared. Sampras was clearly not the player he was in 2001, however, he was still playing at a very high level of tennis during this time. Also, the Sampras serve has really never been affected by age. The serve has always been there; it is the rest of his game that degraded. Statistically, Sampras served far better than he did against Federer than he did against Agassi. A much higher first serve percentage over 5 sets, and fewer double faults if you average out faults per set. He also won more 2nd serve points than he did against Agassi.
However, Federer managed to break Sampras 3 times. He also won more points on the Sampras 1st serve (a key stat to beating Sampras). Total, he won more points than Agassi did on the Sampras serve. This shows you that a pre-prime Federer returned the Sampras serve far better than a PRIME Agassi did (during a period of time that Sampras was not playing that well).
Not only that, for those who believe somehow Agassi's serve is even comparable to Federer's need to get some glasses. A well before prime Federer aced Sampras 25 times, one less than Sampras' total count, while only serving at 62%. Agassi only managed 5 aces with a poor 1st serve percentage of 44%. He won 51% of his 2nd serve points compared to Agassi's paltry 45%. He also saved 81% of his breakpoints compared to Agassi's 66%.
It is very obvious that Federer in 2001 was FAR before his prime, and Sampras was MUCH closer to his (He made a SF that year at the Australian Open, would make a final at the USO, and later next year would win the USO). Agassi in 99 couldn't even touch Samrpas. A rookie Federer had FAR superior statistics in the returning and serving department than Agassi.
Agassi has almost no chance of beating a prime Federer. Sorry Agassi fans, that's the truth.