I can't see him losing to Jo-Willie. Not at Wimbledon, at least.
I'd agree, it is a slam after all ......but how much can he summon at will? Like I said, at his recent level he's not winning that match, and it's not easy to find an extra gear out of nowhere.
Fortunate he has such an easy draw .... for the second year in a row (would be suspicious if Nadal's wasn't so brutal).