From Diego Simeone to Arne Slot. There have been a few unhappy campers in Celtic’s opposition dugout in the Champions League this season. Celtic deservedly secured a 2-1 win over Feyenoord in the Champions League on Wednesday, but it came with Arne Slot’s annoyance. It seems as though the Feyenoord coach was steaming before his team conceded a penalty, which probably didn’t help matters. Luis Palma opened the scoring for Celtic, via the penalty spot, when Liam Scales was wrestled down in the area. According to a BBC reporter, Arne Slot was in ‘deep conversation’ with the fourth official and co…
