In the summer transfer window, Sunderland tried to sign Celtic starlet Lewis Morgan on loan, according to The Scottish Sun.
Sunderland manager Jack Ross had combined with Morgan to earn St Mirren promotion to the Scottish Premiership in the 2017/18 season.
But Celtic decided to keep Morgan and use him in their first-team squad this season.
The 22-year-old is rated as one of the top talents in Scotland and they were hoping that he could build on the success of last season, where he scored 18 goals and won the Scottish Championship Player of the Year accolade.
However, Brendan Rodgers has used Morgan sparingly and he has only started one game.

The twice-capped Scotland international has played 12 times, including eight times in the league, but is very much considered a fringe player at Celtic Park.
With game time looking limited, surely Morgan would benefit from reuniting with Ross and getting regular playing time at Sunderland.
The Black Cats are seeking promotion from League One this season and Morgan’s goal scoring ability from the wing would provide a real threat down the flanks for Ross.
Sunderland should contact Celtic about a potential January loan move because it may be in the best interests of all three parties.