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Aberdeen boss Derek McInnes has revealed he could be without his captain Ryan Jack for the Scottish Cup Final against Celtic .

The Dons skipper has suffered a tear in his groin that could keep him sidelined for the Hampden showdown at the end of May.

Jack is out of contract at the end of the season and has been linked with a summer move to America with Columbus Crew in the MLS.

(Image: SNS Group)

The midfielder made his debut for Aberdeen at the age of 18 in 2010 and has made nearly 250 appearances since.

"It is a real blow for us at this stage of the season," McInnes said.

"We are hoping he will be back in two-to-three weeks but he will be touch and go for the cup final.

"It is hard for Ryan but hopefully he will recover in time.

"There is a slight tear there but at this stage it is impossible to tell."