There is no such thing as fluke when you defeat Nadal and Federer to win your first grand slam. Delpo is young and still has a shot to win another GS. Delpo was on fire and no one could stop him at the 2009 USopen.
I know that, just trying to see if the doubters/haters have changed their mind.
He did that at 20yo no less and against his worst matchup in the final, it was impressive
He can definitely win at least another one of course; he's just 23 (so he has upside) and there's no player below the age of 25 who's even remotely close to being as good as he is at the moment, so the future should be good for JMDP health allowing.