I've been following Del Potro since he came back in Del Ray. I gotta say I'm both impressed and concerned. I'm impressed because the serve is better than ever, the forehand is still a WMD. The movement still needs some work, but that should fix itself the more he plays. The backhand, I'm not too sure what to think of. He's very reluctant to hit a proper 2HBH during rallies, only using it on the return or from time to time. 90% of the backhands he hits are slices, so it's definitely a huge weakness. Regardless, he's still been able to win a couple of matches. Federer will surely exploit this weakness tomorrow, but it will be interesting to see how JMDP deals with it. What I'd like to know is the reason why he doesn't want to hit a 2HBH? Is it because there's still pain? Confidence issue? Scared of re-injuring? If he's going to give up hitting a proper 2HBH, why not switch to a 1HBH? He's already got a good slice, what would he have to lose?