Neil Lennon described the referee Bobby Madden's performance in Celtic's controversial 1-1 draw with St Mirren in the Premier League in Paisley as "appalling" and revealed he will appeal the red card handed to midfielder Victor Wanyama.
Kris Commons headed the Parkhead side into the lead in the sixth minute before he was carried off on a stretcher just before the break with an ankle injury.
The home side had the ball in the net in the first half from a Gary Teale cross only to have it ruled out for Paul Dummett's challenge on the Hoops' goalkeeper Fraser Forster. They then had a good penalty appeal turned down moments from the interval when the ball appeared to hit the arm of Georgios Samaras.
Wanyama was shown a straight red 10 minutes into the second-half for a challenge on Paul McGowan, who levelled from the spot with 10 minutes remaining after Emilio Izaguirre was judged to have fouled Esmael Goncalves, when it looked like there was little or no contact.
"That was the most appalling refereeing performance I have seen for a long, long time," Lennon said. "I mean, you can't get so many big decisions so wrong, it is incredible."