Several upsets and close calls till date.
Hewitt vs. Soderling: Great to see the spirit that took Hewitt to a Wimbledon championship all those years ago re-emerge again. Unfortunately for him, Soderling figured it out and broke him in the final three sets at exactly the right time. Don't know how many more years Lleyton has in him, but it was still a great match to watch between two skilled players.
Harrison vs. Ferrer: Harrison looked great against Ferrer until the Spaniard's experience won out. Ryan has a lot to be proud of, going almost toe to toe with a top tennis player in five sets. If he keeps this up and reins in his tantrums, he might be the next big American tennis star.
Roddick vs. Lopez: Solid and at some moments brilliant play from Feliciao Lopez. It is disappointing to see A-Rod get completely flummoxed, play sub-par and get ousted in straight sets. Thought he could have made another run on his best surface for another year. Very disappointing.
Verdasco vs. Haase: Another formerly top player who seemed to have spiraled into oblivion. What's going on, Fernando?
Wawrinka vs. Bolelli: Another case of what happened? I think Stan got a little too confident.
Muller vs. Raonic: Would have loved to see more of Milos, unfortunately it was not meant to be. I expect that he will get his chance to shine though.
Benneteau vs. Berdych: After a somewhat disappointing first half of the season, Berdych looked like he had something to prove. And prove he did, blasting Benneteau out of the tournament. I expect Tomas in the quarters at least.
Isner-Mahut, part 2: Well, I doubt anyone expected this match to live up to anything like last year's. In fact, a quick match was probably the only logical conclusion. Unfortunately, Isner was then immediately ordered back to court 18 where he fell to Nicolas Almagro. That court just isn't giving him the best memories, is it?
So we have some potential spoilers out early. If Isner or Raonic have stayed around we might have gotten a few more upsets. But there are still dangers like Yen-Hsun Lu (who already ousted Viktor Troicki) and Xavier Malisse. Also think Fish and del Potro can make it far. Will see how it works out.
As for our top 4:
Murray. Every Wimbledon was his expected chance to shine, but he has yet to do so. He is probably playing the best tennis of his career to date right now, but he still looked a little shaky in the first two rounds. If Andy steps it up, possibly, maybe, he has a good chance of doing some damage against Rafa.
Federer. His favorite Slam, his favorite surface and the crowd favorite if not for Murray. Perhaps the best tennis player ever who was already discounted by some as on his decline until he blasted his way back into the finals in Roland Garros only to be denied by his perennial archrival. In search of #17. He plays like the champion he is and also like the man who has nothing to lose. Favorite? Yes. Sentimental favorite? Absolutely. Rooting for the Fed? Check.
Djokovic. The stumble in the streak against Roger was perhaps inevitable, but I'm not sure that the Djoker's confidence has been all that shaken by that match. Hasn't looked his best in the first two rounds and grass is not his most comfortable surface, but I do think that Nole has truly advanced to the level where he'd be a constant challenger and threat to Rafa and the Fed. I would have loved to see a final between Novak and Roger if not for the seeding. Go Nole!
Nadal. While he has showed vulnerability against big servers, a combination of luck and sheer power play preserved his hold as the undisputed king of clay. We don't know how much longer Rafa can keep stepping it up, but right now, he doesn't look like he's slowing down. Frankly, I am a little tired of Rafa, but there's no denying he is probably the king of tennis at the moment, and could be staying there for a while.
As for the women, it shouldn't have been all that surprising for Lisicki to outplay Li Na, but I didn't see that one coming. Still find it unsettling that Wozniacki could be the top seed without having won a single major, and I consider such players as Li and Schiavone to be much more interesting and capable. Then again, what do I know.
Good for Sharapova if she can find it in her not to wimp out, and make it back to a Grand Slam final, but at the moment, I don't think anyone's holding their breath. With 2nd seed Zvonareva also out, I agree Serena will probably successfully defend her title.