Although there are two quarterfinals left, and either lower-ranked win would constitute an upset, I’m going ahead and listing the upsets of the tournament so far.

Bernard Tomic d. Feliciano Lopez, 2R. It’s really his defeat of Lopez and Chardy in the first round that make this a relatively huge upset.  Tomic is ranked 199 and needed a wildcard to avoid qualifying.  He nearly took a set off of Nadal.  Most people see this as a sign of a player on the rise.  He’s only 18 years old.  Right now, he needs to tame his game down.  He hits brain-dead shots, but can already hit aggressively.  He needs to work on his focus and his first serve, but is finally starting to play well.

Aleksandr Dolgopolov d. Robin Soderling, 4R. Dolgopolov was already seeing his rank go up last summer.  He pushed Rafa somewhat at Madrid.  So his upset of Soderling wasn’t as big as it could be.  However, Soderling was playing well coming into the Australian Open.  He couldn’t get his power game to faze Dolgopolov while Dolgopolov moved Soderling around taking advantage of Soderling’s somewhat slow foot-speed.

And finally, the biggest upset of the tournament?

Milos Raonic d. Mikhail Youzhny, 3R.  Raonic had already beaten Michael Llodra, a seeded player.  But Youzhny is a savvy veteran.  Raonic took a set off of David Ferrer, but eventually didn’t have enough steadiness to beat the speedy Ferrer.  Ranked 155 and needing to qualify to enter the main draw, this is an impressive debut and should push him to the top 100.