Teams play 2v2 with the winning team staying on. If your team concede you must quickly swap with the team behind the goals you were defending. If the ball goes out of play, both teams switch. Players behind the goals are passing a ball and must always be checking the shoulder to see when they must enter the pitch. I have placed a keeper at the side working on distribution and passing the ball into the first team on the pitch and ready meaning players must always be scanning and reacting quick to come on, otherwise they may be scored against immediately.