Sorry to use the beloved footballing cliche but I think the decision should be made one game at a time. I've no idea how fragile he is but under normal circumstances I would advocate playing him as much as possible. However, as I said I've no idea about the likelihood of a recurrence or his general fitness level. So I think medical staff and Rambo himself have to take the lead in decisions. For Bulut, I think it's about having a generic plan for when Rambo is not available. In a nutshell, if he's fit and willing, then use him and if not, have plans B ready.