Barnsley manager Keith Hill has dismissed speculation about the future of captain Jacob Butterfield.
The 21-year-old has been linked with a January move to the Premier League.
Hill described the reports as 'madness' and also ruled out the possibility of Butterfield being allowed to leave for nothing next summer.
"We've offered him a substantially improved contract and if it has to go to a tribunal it will," he told BBC Radio Sheffield.
"Jacob Butterfield is not leaving this club for no money in the summer - he's not available on a free."
Butterfield, who was recently called up to the England Under-21 squad, has scored five goals so far this season and has attracted the attention of a number of clubs, reportedly including Aston Villa.
But Hill said: "I just don't understand how players trust and have the ear of an agent who dictate where players end up.
"There's no question to be answered about Jacob Butterfield's future - it's at Barnsley football club."
However, he acknowledged that a sizeable offer - with some reports suggesting £2m as a possible figure - would be hard to turn down.
"Now if the type of money you were talking was to be offered on the table then the club would have to consider it," he added.