Re: Del Potro will storm the 2013 season
It all depends on what storm is supposed to mean. You've said by winning a GS but I think storm would be the way Djokovic played during 2011, for example.
I do think that if he can stay injury free he can look forward to a good next year or so though. I think he's a darkhorse for this upcoming USO, but I can definitely see him winning one of the two hard court GS's, unless Djokovic is playing unbelievable tennis in which case he'll win them. I'd also expect him to be able to get back to at least 5th in the rankings. I don't see him storming the GS's but I think he'll have an excellent season, again depending on how he copes with injuries.