Celtic registered a 2-0 victory over Rangers in the first Old Firm derby of the season on Sunday.Goals either side of half-time from Odsonne Edouard and Jonathan Hayes sealed all three points for the visitors at Ibrox.Scott Brown captained the Bhoys to victory at the home of their fiercest rivals - but was then subjected to a sickening jibe from one Rangers supporter outside the ground after the match.Footage has been posted online which shows Brown walking out of Ibrox, on his way to Celtic’s team bus.A man can be heard saying to Brown: “How’s your sister?’

Brown stops still and looks directly at the man without saying a word.

The midfielder’s sister, Fiona, tragically passed away in 2008 at the age of 21 from skin cancer.

One of the policemen immediately says: "Oi less of that.

"Beat it, you. Move.”

Another fan can be heard saying to the Rangers supporter: "Come on to f*** man, that's out of order."

Disgusting. What is wrong with some people?

Former Celtic striker Chris Sutton tweeted on Tuesday night: “The Scott Brown video is absolutely sickening. It’s hard to imagine anybody could actually be as sick as this.

“There is no place for this sort of behaviour anywhere in society. Enough is enough and the scumbag responsible should be held to account.”

Scotland women’s international Nicola Docherty was also furious after watching the video.

"To the rangers fan that made that comment to Scott Brown after the game,” she tweeted. "He should most definitely be banned from any form of football match.

"Absolute disgrace! No room for that in football at all!"

According to The Scottish Sun, action has been taken by Rangers, who have banned for the man from Ibrox for life.

He will not be allowed to attend another match and rightfully so.

There’s simply no room in football for this sort of behaviour.

Rivalries are all well in good in football but that comment direct to Brown is utterly abhorrent and completely unacceptable.