Martin O'Neill has explained why he has rung the changes for Celtic's away game at St Johnstone.
The Parkhead manager has taken five players out of the side that beat St Mirren on Saturday night, and replaced them.
Viljami Sinisalo has been replaced in goals by new loan signing Sam Johnstone, while Cameron Carter-Vickers is not in the squad at all. Benjamin Nygren, Yang and Camilo Duran also come out, while Dane Murray, Oliver Sorensen, Sebastian Tounekti and Kasper Hogh get starts.
Asked if the rotation was down to a packed schedule to come, O'Neill said: "Well, no. Not necessarily, I must admit, because this is the most important game.
"But it was just a chance, you know, you talk about Carter Vickers, he played every single game, considering he'd been out all of last season. And the same with Duran, he's come in, he's been an exceptional player.
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"And if you consider that Duran, Nygren, who scored big, big goals for us, are not starting tonight, but I'm quite sure they'll be on the field of play at some stage."
On the decision to start Johnstone, he explained: "Sinisalo, I think he's done really well.
"Taking over from Kasper last season, that wasn't easy, but he stepped into those shoes and he's done very, very well.
"We've got a lot of games coming up, not just in the immediate future, but obviously between now and Christmas time.
"So it's a chance to see what Sam, who's been doing this really in his own campaigns, I think it's a chance to see what he's capable of doing. And I know that he's a very, very fine goalkeeper, but just to get used to the environment of Scottish football."
The Celtic boss added that the omission of Carter-Vickers was purely precautionary and not down to an injury problem.
