The Celtic skipper watched as his side lost in the final minute of injury time to Lazio on Wednesday night.
Callum McGregor reckons only disappointment is a guaranteed thing in football and that Celtic are 'hurting' from their Champions League sucker punch.
McGregor wants a response of the merciless variety when Derek McInnes brings his shaky Killie side to Glasgow, but that Brendan Rodgers men will show just how much they are hurting with their performance in domestic action. The Irish coach hasn't been beaten in the Scottish Premiership so far, with the visitors winless in their last five games.
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