Rangers need to park the Champions League play-off failure behind them with an Old Firm derby next up on the calendar against Celtic on Sunday.

The build-up has been a few pages from the back as a result but the usual conspiracy theory has been started.

Speaking on the No Tippy Tappy Football podcast, Alan Stubbs has made an incredible penalty claim involving Rangers during an Old Firm game he was playing in for Celtic.

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Penalty to Rangers Old Firm nonsense begins from Celtic

This seems to happen almost ever time Rangers have an Old Firm derby and Celtic come to town.

The former Parkhead skipper could find himself getting a phone call from the SFA or a knock on his door because, basically, he has accused a Scottish referee of match fixing:

“There was a certain referee, who was refereeing the Celtic Rangers game, the Old Firm game.

“We had a stonewall penalty which was not given and the referee, I’ve gone to the referee and I’m saying to him, ‘How on earth can you not be giving that?’.

“And basically, ran past me and said ‘While I’m refereeing, you’ll never get a penalty against Rangers’.”

Rangers fans have to put up with this sort of stuff every Old Firm and we know why a former Celtic player is making this sort of claim in the build-up to a derby but it raises a series of questions.

Why does he not name the referee?

It will be easy to prove the allegation because the game would have been on Sky Sports.

Rangers FC v Celtic FC - Cinch Scottish Premiership
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Why has he never told this story despite being in the media on a regular basis?

Why didn’t he report the referee at the time or say to the media immediately after the game?

I think we all know the answer.