I think his foot is all right now - I think they gave him antibiotics in that drip.
He says he doesn't like having to be away from home so much and he gets homesick. He didn't actually say he gets homesick but that's how it looks. He has seen (is seeing) a psychologist to help him with his mental health.
It must be very difficult to have to be away for such a long time every year, I feel sorry for Nick. He's a good player but he does have some difficulties on the tennis courts around the world.
He's scheduled to play Ryan Harrison in the 1st round at Brisbane, should be a win for you Nick