Dons boss Derek McInnes is confident Kenny McLean will be a hit in England, but hopes he can bow out on a high at Parkhead.
Scotland international midfielder McLean will re-join parent club Norwich City in the summer.
McLean joined the Championship Canaries on a three-and-a-half year deal in the January transfer window.
He was then loaned back to the Dons for the rest of the campaign.
McLean sustained a calf injury in the 1-1 draw with Rangers at Pittodrie and McInnes is sweating over his availability for the season closer at Celtic.
Aberdeen have already confirmed European qualification after rivals Hibs lost 2-1 at Hearts.
The lowest the Dons can finish in the Premiership is third, but McInnes hopes McLean is available to bolster the bid for second.
He said: “Kenny felt his calf and was struggling.
“At one point we felt we may have to take him off but he was having such a good game I was reluctant to do that.
“The Rangers match was Kenny’s last game at Pittodrie and he was even more motivated to go out on a high.
“When he is in my team he is such a big influence.
“The strike where he hit the bar showed his confidence and where he is at the minute.
“Kenny is going to be a very good Norwich player. Hopefully he will be okay and can be a very good Aberdeen player in his last game for us on Sunday.”
Aberdeen will be without Scotland international centre-back Scott McKenna for Parkhead through suspension.
On-loan Celtic attacker Ryan Christie is also ruled out against his parent club due to the terms of his loan agreement.
The Reds are one point clear of third-placed Rangers going into the season’s climax.
“We are in good form and had some fantastic periods of play against Rangers,” said McInnes.
“Even going into the split our league form was good. Since the split, to win two and draw two against the best teams is good shooting.”
Aberdeen face Celtic with the momentum of being undefeated in their four post-split fixtures.
They had secured three successive clean sheets before conceding a goal to Rangers.
McInnes said: “The goal we lost was scrappy and we have to be more switched on and alive.
“We needed to be sharper and more tight to stop that ball coming into the box.
“We needed to defend better for their goal.
“The whole game we defended throw-ins well with really tight lines and stopping crosses to frustrate Rangers.
“We gamble on the throw-in to Morelos and come out.
“Once we got that lead and had something to hold on to we should have defended our goal better in that instance.
“That was the first goal we have lost post-split.”