SubstitutesIn Lisbon, clubs were permitted to make five substitutes off the bench.The idea was this would reduce the effects of fatigue that might have been felt due to the packed schedule and UEFA has extended this into the new season, once again using the risk of fatigue on players as a reason for this controversial change.Get the latest breaking Manchester United news and analysis every day direct to your inbox with our free MUFC newsletterSign up here - it only takes a few seconds.Champions