He seems to be in good shape, I certainly wouldn’t bet against him getting a stage win. I guess it depends on what his ambitions are though, stage wins or a top 10 finish on GC ?
If it’s the former, and he has the legs to attack, and if the other GC riders in the top 10 are marking one another out and don’t see him as a threat, they might just give him enough rope to take a stage on a summit finish. Or one with a quick descent to the line after the final climb. Of course, other riders with designs on a stage win will have similar ideas.
If he shipped more time on GC, before the high mountain stages, maybe getting into the days breakaway could provide an opportunity too.
As always in cycling, there are so many ifs and buts but that’s what makes it so exciting ( to my mind at least ).