Celtic manager Martin O’Neill has provided an update on the injuries of Colby Donovan and Alistair Johnston, both of whom are crucial to the team's defensive lineup. Donovan, who sustained a hamstring injury during the recent 2-1 victory against Dundee at Dens Park, will miss the upcoming match against St Mirren and the Scottish Cup semi-final. However, O’Neill is optimistic that Donovan will return in time for the top six fixtures. Meanwhile, Johnston, who has been sidelined since October, has resumed training with the squad at Lennoxtown. Although he is not expected to participate in the match against St Mirren, O’Neill expressed hope that Johnston's recovery is progressing well and that he could be back in contention soon. The current injury situation leaves Celtic with limited options at right-back as they prepare for critical matches ahead.