Aside from the abs, which I assume are an aesthetic choice, the only anatomical problem I see is in the quadriceps. It sort of looks like he just has one big sartorius, I don’t see any indication of the other leg muscles. If this is another aesthetic choice then so be it, but I’m not sure it’s the one I would make. The radius is also quite pronounced, but I happen to like that detail. I would like to see a close up of the forearm, it’s looking good from what I can see, but there might be a small adjustment or two that can be made.
Otherwise I can’t find a single thing that looks remotely questionable, so well done.
Edit: Oh, and like Cherub said, the triceps you’ve made are very small, though again, I think that adds character to the sculpt.