Football teams often refer to their fans as being their ’12th man’ but a substitution muddle on Saturday saw Bundesliga leaders Bayern Munich briefly field an actual extra player in their 4-1 win at Freiburg. Marcel Sabitzer and Niklas Süle were introduced as 86th minute substitutes but initially only one player appeared to make way, leaving Bayern with 12 on the pitch for around 20 seconds. Referee Christian Dingert was alerted to the confusion by Freiburg players and stopped the match for a few minutes as matters were cleared up. “I noticed that Niki came on and no one went off,” Freiburg de…