Easy. With a serve that big, you can beat anyone. Anywhere.
Of course, there are more nuances to it than that. But with the way the men's game is nowadays, clay could be considered the most wide-open surface out there. Just look at what John Isner has done in Davis Cup on the dirt. Perhaps as recently as five years ago, you'd see a big hitter in the mold of Raonic getting eaten up by someone who's won more than 10 titles on clay like Almagro has, but that's no longer the case.
And I promise this is the last time I type this (until the next time I type it!): American men should view the French Open as an opportunity and do everything they can to get ready for it, which means playing more in Europe. The surface is just as favorable to the big hitters. If the footwork's not tight or the condition acclimation is off, that is what'll leave them high and dry.
I'll hop off my soapbox there and give props to Raonic: very well done.
An old friend of mine and I used to talk tennis for hours, whether it was our own games or what was happening in the pros. I've started Tennis Talk, Anyone? to, well, talk tennis with an even broader crowd! My name is Van Sias and I've been playing for 20 years now, and not only am I player, I'm a huge fan of the game as well: pro, amateur, you name it. I'll post links to news items related to the sport, and offer my own personal opinion, predictions and hopefully get some of yours as well.