Celtic manager Martin O’Neill has eased early concerns around Kieran Tierney after the defender picked up a knock in midweek.

Tierney was forced off during Celtic’s win over Aberdeen after a heavy challenge left him clutching his foot. The moment quickly raised questions about his availability for Sunday’s Scottish Cup quarter-final at Ibrox.

The left-back has become a key figure again since returning to the side. His energy down the flank has added width to Celtic’s play, and he also opened the scoring at Pittodrie earlier in the week. Losing him ahead of a derby would have been a major disruption for the team.

There were also worries when Tierney was not spotted in Friday’s open training session at Lennoxtown. That absence only increased speculation about whether he would be ready for the trip across the city.

O’Neill said: (Sky Sports), “Although the injury had to his foot.

“He’s actually clearing up.

“But he’s just generally sore in every aspect.

“So we’ll see how he is tomorrow.

“But generally speaking, he’s done fabulous for us, and now he’s getting back to almost complete fitness, which is great.”

O’Neill’s comments suggest the problem is more about soreness than a fresh injury. That will give the medical staff some room to assess him before making a final decision on the squad.

Tierney has been building rhythm after earlier fitness issues this season. His performance against Aberdeen showed how sharp he can be when he finds space on the left side. Celtic used him high up the pitch, often overlapping to stretch the defence.

If he is not ready, Celtic still have cover in that position. Marcelo Saracchi has stepped in several times during the campaign and has looked comfortable when called upon.

The final decision may come late. Derby matches bring their own intensity, and the coaching staff will want to be certain Tierney can handle the physical side of the game before risking him at Ibrox.