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Barnsley boss Keith Hill has said he firmly expects captain Jacob Butterfield to leave the club at the end of the season.

Butterfield, 21, is out of contract with the Tykes in the summer and Hill does not expect the midfielder to sign a new deal with the Championship side.

"We've offered him a good deal, in my opinion he won't accept it," Hill told 91�ȱ� Radio Sheffield.

"He will leave the football club and probably for the Premier League."

And the Oakwell boss says he is frustrated with the tribunal system that will decide how much compensation the club will get, should Butterfield leave.

As the player is under 23, the Tykes would be owed a fee by whoever he signed for but Hill is resigned to not getting what he believes his player is worth.

"There's no fee guaranteed, so we'll probably have to take it to a tribunal," the former Rochdale manager added.

"In my opinion he's worth £3m. Will we get that amount? Absolutely not.

"By the time a tribunal sorts out how much we're going to get for him it'll be the middle of August or later."

Butterfield was ruled out for the season in January after suffering a knee injury in the 4-1 win over Leeds United in December.

Meanwhile, full-back Luke Potter has been forced to retire at the age of 22.

Potter has suffered with a chronic knee injury and his last appearance came in a loan spell at Alfreton in November.