I agree with Mick, and allow the sub. Another reason I can see is that white had a team on the floor based on what red had or didn't have on the floor. When red changes their team, it is only fair to allow white to "match up" by substituting. If the new red team player happens to be their offensive star, who was going to take a breather, then the white team should be allowed to sub in their defensive stopper who was on the bench for the same reason. IMHO
