The 23-year-old has been linked with the SPL champions and English Premiership side Newcastle United.

Breda director of football Earnie Stewart told the Daily Mail the club were attempting to negotiate a new contract with the player.

But he added: "Celtic have faxed us a note of interest and are the only club so far to do that."

Rigters hit four goals for Holland en-route to the side winning the European U21 Championship final, and Stewart said the club were keen to keep him.

"We are in the process of negotiating a new improved contract with him," said Stewart.

"But, if he wants to speak to Celtic, then there is nothing we can do about it because it's all been done by the book."

Celtic declined to comment on reports linking the SPL club with Rigters.