Celtic fans will be keen for Callum McGregor to play a starring role during the run-in after our club captain returned from injury at Ibrox. The Scotland international came off the bench in the 65th minute at Ibrox, replacing Reo Hatate, who has also recently overcome long-standing fitness issues. By his admission, McGregor revealed last week that he still isn’t 100% due to a lack of hours on the training field; however, the 30-year-old will have endured a full week on the grass at Lennoxtown before our home clash against St Mirren in the Scottish Premiership. He stated after the Glasgow Derby…