A limp performance halted Celtic's recent momentum somewhat. Here are three players who weren't at their best against Inverness...
Opinion is very much split on the Celtic defender, with many leaping to Ambrose's defence considering the amount of criticism he receives at Parkhead.
Against Inverness, though, it was very much the Ambrose Celtic fans have grown tired of. On the ball, he was shaky and, as always, there was a mistake in him just waiting to happen.
There are clear alternatives to starting the Nigerian for Ronny Deila - will he use them?
A stellar performer since joining the Bhoys and in confident mood ahead of the Inverness clash.
It didn't show on the day, though, as the 23-year-old delivered an uncharacteristically flat performance during the 1-1 draw. His set-piece deliveries were hit and miss but it was Armstrong's lack of creativity on the ball that was most disappointing.
Celtic struggled to do any damage from out wide for the most part and Armstrong was a big culprit in that department.
And so too was his former Dundee United team-mate, who was taken off by Deila in the second half.
After opening the scoring, the Bhoys failed to threaten for the majority of the rest of the encounter. The result and performance shouldn't have too much of a bearing on Celtic's season - or Mackay-Steven's - as a whole but it'll be a display Deila will want to put behind him as soon as possible, especially that of GMS and Armstrong.
In Celtic's defence, another poor pitch didn't help them in action. But they'll need to do much better in the Scottish Cup semi-final against the same opposition.