Aberdeen manager Derek McInnes thinks Niall McGinn has been "let down" by his agent after a picture of the player watching Celtic was posted on Twitter.
The image tweeted by Gerry Carlile shows McGinn sitting next to Celtic striker Anthony Stokes at Rugby Park as the visitors beat Kilmarnock 2-0.
"I think the only thing Niall is guilty off is a bit of naivety," said McInnes.
"You'd have to ask the reason why it came out on Twitter. His agent has shown a poor regard for Aberdeen."
The victory for the champions on Monday closed the gap on Premiership leaders Aberdeen to one point.
"Niall goes on his day off to watch a game of football," explained McInnes. "I like my players going to watch games. I'd rather they did that than sitting in a pub.
"I've got loads of players who go to watch former team-mates. But because it's Niall and because it's Celtic, it maybe gets more attention.
"His tickets were supposed to be in the main stand and he finds himself in a situation where he goes along to watch a game (in among Celtic supporters).
"It's how it's perceived and Niall knows that.
"Whether he (Carlile) knowingly put it out there, I don't know. He hasn't taken my call. But I do think he's put Niall in a difficult situation. I think he's let Niall down."
|Football agent Gerry Carlile|
|"I have a strong relationship with Derek McInnes, Duncan Fraser and Aberdeen Football Club. I have sent a private correspondence to the manager outlining my position and now consider the matter closed."|
Northern Ireland international McGinn, 27, moved to Celtic from Derry City in 2009, joining Aberdeen three years later after a season on loan at Brentford.
He has been a key player at Pittodrie and recently signed a contract extension until the summer of 2017.
"Our supporters know Niall is fully committed to Aberdeen," added McInnes. "Anyone who has seen my team this season has seen a fully committed team and Niall has been part of that.
"While it's not ideal, I'm not losing any sleep over it either."