I didn't mean before the match started. I meant when you watched the match, you understood Sampras would win from almost the get-go. His serve is vastly superior to Agassi's and that's crucial on fast surfaces.
I don't agree at all.
In their four US OPEN matches (yes, in all of them) Agassi was the clear favourite to win.
In 1990 Agassi was nº4 in the world whereas Sampras was nº 12 and not a big favourite.
Even after his great performances beating nº7 Muster in R16 (a great match by the way, I watched recently, with Muster relentless lefty mega-top-spin and ultra-heavy and solid backcourt game and a very young Sampras making impressive volleys, passing-shots, lobs and what-not...), beating nº2 Lendl in the QF in five sets (Lendl had gotten to the last 8 US OPEN finals) and McEnroe in the SF (another great display by young Sampras, not intimidated at all by those two all-time greats), as I was saying, even after all these great performances by Sampras, still Agassi was the clear favourite to win the final.
In 1995 Agassi got to the US OPEN final with a 26 straight wins on hard courts during the summer (he won all four tournaments he played, included Canadian Open M-1000 defeating Sampras in the final, and Cincinnati), he was nº1 in the world at that time and he was almost unbeatable on hard court at that moment. He was the favourite to win the final.
In 2001 Agassi was again the favourite to win because he was nº2 in the world and Sampras was having a very bad year (by his previous standard) and was about nº10 in the world.
In 2002 again Agassi was the clear favourite because he was in great shape, was nº2 in the world and Sampras was in his crappiest tennis-level year and was something like nº17 in the world.
Besides, as I said in other threads, except for the 1990 US OPEN (that was a dominating win by Sampras who played out of this world and shocked Agassi), their other three encounters at the US OPEN were all very close matches that could have gone either way.
In the 1995 US OPEN final, Sampras was 6-4 6-3 up basically because he played better (and won) the most important points of those two sets. Agassi had a bit of bad luck to be down two sets to love the way the match was developing. Then Agassi won the third set 6-4 (curiously enough this set could have gone to Sampras who was a break up, but this time the most important point were won by Agassi). And the fourth set was a great and close battle that could have gone either way, but Sampras again played great in the most important points in the last two games to win it 7-5.
In the 2001 US OPEN match, what can I say? It was 6-7 7-6 7-6 7-6. It could have gone either way, but Sampras (as he did so many times) won the crucial points in the last tie-breakers.
The 2002 US OPEN match, that Sampras won 6-3 6-4 5-7 6-4, was in a certain sense, similar to their 1995 match. Sampras started playing great tennis at the end of the first set and beginning of the second set (just like he did in 1995 ). Agassi won a close third set (just like in 1995 again) and started very strong the fourth set. Sampras had a game ( when he was 1-2 or 2-3 ) very very long and hard, he had to save several break-points, some of them with pure luck, and it looked like Agassi would win the fourth set and then the fifth set easily (Sampras looked gassed at that point in the match). But somehow he held, he also held serve (I think saving more break points) in his next serving game, but got to 4-4 and then, suddenly, he started to fly free again and played some amazing points to break Agassi's serve.
I really think that had Agassi won the fourth set in the 1995 or 2001 or 2002 and he would have won the match in five (he had much more stamina than Sampras in all these matches, and in general), so I really say that those three matches could have gone either way (and as someone pointed out, both in 1995 and in 2002, Agassi played the second SF and that could made him start a bit flat the final).
On the other hand, in their two matches at the Australian Open (1995 final and 2000 SF) Sampras was the favourite to win, but this time, the "luck" and the "tiredness" went in Agassi's favour.
In 1995 Sampras played three consecutive hard and long matches: a 4-6 6-7 7-6 6-4 7-5 (or something like that) win over Magnuss Larsson in R16 (more than four hours), then a 6-7 6-7 6-3 6-4 6-3 win over Jim Courier in the QF (more than four hours) and a 6-7 6-3 6-4 6-4 win over Michael Chang in the SF ( three and a half hours of gruelling baseline battle). Agassi had defeated all his rivals in straight sets and even Krickstein retired in their SF match.
Agassi won the final 4-6 6-1 7-6 6-4 (he had to save two set-points at 4-6 in the third set tie-breaker). As I said, Sampras was the favourite to win but this time the circumstances were in Agassi's favour (Sampras was spent in the final).
In their 2000 AusOpen SF, again, Sampras was the favourite (because he had defeated Agassi in their 1999 Wimbledon final, 1999 Los Angeles final, 1999 Cincinnati SF and 1999 WTF final) and he was two points away from victory, but finally Agassi won 6-4 3-6 6-7 7-6 6-1. This time Agassi could win the fourth set and then won in five. This could very well have happened in any of their three US OPEN four-sets matches had he won the fourth set.
So, really, their six hard court GS matches (well, all but the first one) were extremely close matches that could have gone either way, and the final winner had more to do with other circumstances than with tournament or surface.
In fact, in their head-to-head they are so close on hard courts ( 11-9 Sampras) and they both won and lost close matches against each other on all kind of hard courts (no matter if it was ultra slow hard courts of Miami, slow hard courts of Indian Wells, medium hard courts of Canadian Open, fast hard courts of San Jose....).
On clay ( 3-2 Agassi ) and grass ( 2-0 Sampras ) they just didn't play so often, so it is difficult to say anything.
And something interesting: Sampras made much more aces than Agassi in their matches, but their unreturned serves stats are not that much different.