Skysports.com understands Marc Tierney seems set to leave Colchester after turning down their final contract offer.
The 25-year-old's contract expires at the end of the season and both parties have been unable to agree a new deal.
The former Oldham ace has now rejected Colchester's final offer on the table and he is poised to exit the League One club.
The news has alerted a number of sides to his possible availability for a cut-price fee in January or for free next summer.
Championship duo Coventry and Norwich are both thought to be leading the chase for the talented full-back and they could move for him in January if Colchester decide to cash in.