CELTIC chairman Ian Bankier has said that the performance of certain referees in Celtic matches is a concern to him as he addressed questions from shareholders at the club’s AGM.

Bankier was quizzed upon incidents involving officials Nick Walsh and Bobby Madden, with a flashpoint cited in Celtic's match against St Johnstone – which Walsh refereed – in which Cameron Carter-Vickers and Saints forward Chris Kane tangled and both received cautions, despite Kane seeming to be the aggressor.

"That is a source of deep concern,” Bankier said.

When pressed further on whether it was also a concern that the same official will take charge of Saturday’s League cup semi-final against St Johnstone, Bankier added: "We don't run the SFA.

“We are a member club of which there are others and we get our shout, we get our say.

“You can't expect us with a flick of the wrist to tell the SFA what to do and what not to do. We don't run the game."

Bankier was then asked if the performance of referee Madden in Celtic’s visit to Pittodrie last month, where he awarded 27 fouls against Celtic despite Ange Postecoglou’s side having 61 percent possession, was also a worry.

"Yes,” he replied.

“You are always concerned about the referees' performance. We make representations on a regular basis to the chief executive of the SFA on refereeing."