I don't know what he should do, really. It just seems such a waste to retire when he is able to play like he did at times lately and today again.
I am now quite convinced he's doing better at ATP level and Challengers might be just too much for a proud guy like him. He has played only a couple of ATP events, possibly not enough to really fix that serving issue.
Unfortunately, the clay season is almost over now. And he won't be able to use his PR
much longer anyway, he will need WC everywhere. It's a very tough situation... I found it easier a few months ago when I thought the serve had contaminated his whole game and he was probably not really motivated to keep playing like crap anyway!