Ridvan Yilmaz's participation in Sunday's Old Firm derby remains in doubt.

Philippe Clement has revealed he's yet to make a decision on the Rangers left-back, who has been out of action since picking up an injury while on international duty with Turkey.

It was hoped that the defender, 22, would recover in time to play Celtic at Ibrox, and while that may still be the case, there are no cast-iron guarantees with less than 48 hours to do until kick-off.

There is some positive news on the injury front, though. That is that Abdallah Sima - who made his first team comeback in last week's victory over Hibernian as a substitute - should also be fit to play from the start if selected, but could not last the entire match.

"Ridvan not sure yet, we will see tomorrow and make a decision," the 49-year-old admitted. "Everyone else from last week is available.

"Sima is fit enough to start but could not play 90 minutes. I have a decision to make on when best he will have an impact."

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On the occasion itself, he added: "It's a big game we know. It's not yet a decisive game, whoever wins is not the champion.

"I am happy with what I have seen from my team and the points we have collected since the last Old Firm. We have consistency but that is not a guarantee for anything.

"I see my team growing month by month. From the beginning I have been clear, I don't want a team that stays in emotion from a result and the next game they are not there.

These games are decided in details and moments. We work really hard on our structure, on our discipline, on our tasks and on our confidence also. Consistency to know what to do with and without the ball."