Celtic’s three red cards in last season’s UEFA Champions League were hammerblows to crucial away matches in the group stage. Gustaf Lagerbielke and Odin Thiago Holm were both sent off in a 2-0 defeat against Feyenoord, while Daizen Maeda’s red in Spain against Atletico Madrid didn’t help in a heavy 6-0 loss. Discipline will be critical when Celtic travel to Borussia Dortmund on Tuesday night. Players can’t afford to make a silly error or be suckered into picking up preventable cards. Refereeing in European competitions is notoriously a little more card-happy than in Scotland it’s something the…
