I think Raonic is a bit of an interesting case, because he is quite young and does possess one of the best serves in the game. People can overrate the bright youngsters coming through the ranks, but can also pigeon-hole anybody with a big serve as "one dimensional". That being said - people tend to either go completely overboard on how one-dimensional he is, or hype him up way too much. Personally, I sit on the side of the hype...for now. Despite the fact that he has not made a deep run in a Slam as of yet, you have the feeling that it may be imminent, especially now that he is in the Top 16, that means he pretty much would only need to upset 1 player ranked above him to make a QF. Obviously he has shown that he can keep pace with the Top 10 in Masters series, or 250/500s, he has pushed Federer a couple of times this year, and also beaten Murray, Berdych, Tipsarevic and Almagro, I'm not saying he is going to win a Slam, but having just QF'd in back to back Masters tournaments, I think he is a realistic chance of making a QF in a Slam some time soon.