Furious Neil Lennon has promised an internal probe after Celtic’s team news was again leaked.
Late last night and on Saturday morning rumours swept the internet that correctly called the line-up for the Rangers clash.
Although some were wide of the mark, one was spot-on as it stated teenage centre-back Stephen Welsh would start ahead of Christopher Jullien.
Lennon made no mention of the French defender being out when he performed his pre-match media duties on Friday.
The leaked team news also called correctly Patryk Klimala starting, while Odsonne Edouard wouldn’t even make the bench.
The Lennoxtown mole has enraged Lennon before and the Celtic manager left listeners in no doubt when asked how he felt about it by a radio journalist.
He said: "You've no idea. I don't want to comment but we'll deal with it."
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It’s not the first time Celtic’s line-up has been released well ahead of kick-off.
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The most controversial came ahead of the 2-1 win over Rangers at Celtic Park when a leaked team was spot on about Jonny Hayes starting for the Hoops last year.
There was also team news leaked ahead of a midweek trip to St Mirren and a Scottish Cup semi-final against Aberdeen in previous seasons.
Asked about the leak then, Lennon said: "Really not happy. Someone is letting us down."