Celtic are sitting top of the Scottish Premiership table and are hoping to put things right in the Champions League this week. Callum McGregor will be leading the team out in Italy on Wednesday when they face Europa League champions, Atalanta. This comes after Celtic’s dramatic 2-2 draw against Aberdeen at the weekend where the defensive issues reared their ugly head again. Yes, Aberdeen deserve credit for attacking Celtic, but to let a two-lead slip in that manner is an issue, especially given that it’s without the injured Cameron Carter-Vickers. From an attacking sense, you do wonder how the…