"I come out of the brace next Wednesday and go back to see the surgeon at the end of July," he told the club's official website.
"I'm back in doing a bit of work at the moment, but hopefully after that I can really start stepping things up again.
"Of course I'm gutted not to be ready for pre-season, but I'm not putting any pressure on myself now in terms of setting a date or anything.
"I can't afford to push myself too much - making sure it's all done properly is the main thing and when I'm ready, I'm ready."