The Hoops brought a point back to Parkhead but Neil Lennon's side controversially finished the game with ten men.
Chris Sutton has hit out a key moment in Celtic's Europa League draw with Rennes on Thursday night, namely opposition Edouard Mendy's reaction to Vakoun Issouf Bayo's pursuit of the ball late on in the game, which the BT Sport pundit described as "shameful".
With both sides level in the game as the clock was deep into injury time, Olivier Ntcham unleashed a powerful shot from distance which Mendy spilled, and the Hoops substitute tried going for the loose ball, but as the keeper caught it, Bayo leapt over him.
Replays showed there was little to no contact with Mendy, yet the keeper rolled around clutching his face as if he had been struck by Bayo, a reaction which culminated in referee Jose Maria Sanchez showing the Bhoys man a second yellow card and sending him off.
Celtic managed to see the game out and leave Roazhon Park with a point but it made for a nervy finish as Neil Lennon's charges were a man down with around seven minutes of stoppage time added on.
Here is what Hoops legend Sutton wrote on Twitter about the incident, in response to a fan's question:
Can’t appeal as far as I know as it was a second yellow... shameful from the Rennes goalkeeper holding his face... Bayo boot nowhere near his face... https://t.co/hdmmDGFhMX— Chris Sutton (@chris_sutton73) 19 September 2019
In the other game of the group, CFR Cluj claimed a shock 2-1 win over Lazio to top the standings, leaving Celtic level with Rennes ahead of the Romanian champions coming to Parkhead in two weeks' time.
Up next for the Bhoys is Sunday's Scottish Premiership clash with Kilmarnock at Celtic Park, 1pm kickoff.
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