Haha. Yet another thread in the vein of 'let's for godssakes try and keep ourselves amused until tennis finally comes back again'.
Okay there, a 'serious' contribution:
JMDP d. Federer Finals USO - not a genuine upset imho. I think people still had their AO-match in mind too much at that time, but since then, JMDP had proven himself a real top player. He was very close to beating Federer at RG already, but somehow that match went flying under the radar of many. So, not an upset, but a regular 'the better of two top players won'-match.
Cilic d. Murray 4thRD USO - a bit more of an upset I think, but only in the 'occasional tennis fans''s view - Murray suffered a massive dose of over-hyping AGAIN, just like at Wimbledon. But seriously, he just wasn't that good in best-of-five matches in 2009 to allow for all that overhype. He's the man in best-of-three, but in GSs, he still has a lot left to prove, despite his USO final in 2008. Cilic was just playing well and took advantage of Murray's too passive approach.
Tsonga d. Federer QF Roger's Cup - an upset in the sense that whenever a genuine top player is ahead 5-1 in the decider, that player should NEVER lose that match. No excuses, that was a horrid performance from ********. I guess Tsonga needed some pinching after the match to decide whether it really happened or that he was only dreaming!
Kohlscheiber d. Djokovic 3rdRD RG - this comes close to what I'd indeed call a major upset. People had expected a lot more from Djoko as he had his share of tight matches against Nadal earlier on on clay - but apparently he couldn't live up to expectations on the Big Stage. Tired? Oh please, not again...
So, the winner is:
Soderling d. Nadal 4thRD RG - of course, a major upset. Nobody saw it coming, and anyone who had cash on Söderling here has made big bucks on it. Nadal had creamed everyone up till this match, and there was no indication that he'd go down against the Sod whatsoever.
Personally I think the Federer - Benneteau match in Paris should be included in the list as well. Genuine upset. However well Benneteau was playing in that match, whenever the world's #1 loses to a #34, it IS an upset.