Fletcher has scored six goals for Hibs this season
Hibs striker Steven Fletcher's agent says the 21-year-old feels "let down" by the club after they blocked Celtic's attempts to sign him.
The Easter Road club rebuffed their SPL rivals, despite Celtic saying they had made "substantial offers".
"Steven is extremely disappointed and feels let down by Hibs," agent Scott Fisher told BBC Scotland.
"Hibs were unwilling to give Celtic a concrete figure and so we were unable to conclude a deal."
Scotland star Fletcher trained as usual with his Hibernian team-mates on Monday morning and remains at Easter Road after the January transfer window closed at 1700 GMT.
He feels he is not getting the opportunity to further his career
Steven Fletcher's agent
But Fisher says his client believes Hibernian are impeding his chances to progress.
"He feels he is not getting the opportunity to further his career," added Fisher.
The Edinburgh club dismissed an approach on Friday from Celtic to hold talks over a possible transfer for the highly-rated forward.
And his manager Mixu Paatelainen also urged Fletcher not to leave Easter Road this season.
"I'm confident he will stay. We had a chat and I told him I don't think it's the right time," said Paatelainen.
BBC Scotland had learned that Celtic were originally willing to offer a player plus cash for Fletcher, who is under contract at Hibs until 2013.
But, following news of Celtic's interest, Hibs released a statement, saying: "Hibernian FC rejected a verbal approach from an SPL club to discuss the potential transfer of Steven Fletcher. No further discussion is planned."
Fletcher, who has scored six goals this season, missed Hibernian's 1-1 draw with Motherwell due to suspension.
After the match, Paatelainen, responding to questions on Fletcher's future, said: "Eventually in football, there is a time when a player moves on. I don't feel the time is right yet.
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