I did watch it - live.
Celtic played it mostly...or so it seemed...in our 2/3rds of the pitch
Celtic played it mostly with a back 3...which hints at 7 players in MF and upfront.
One manager set it up like this...see above.
One manager set it up like this...see below.
We mostly played with a back 5...which hints at 5 players in MF and upfront.
In the second half when we did somehow engineer a quick break...and we did 3 or 4 times, oft times the 'breakee' was not supported and/or if he was, he would not try to push on into the box, but rather stop, cut back and push it sideways/diagonally back.