A triple substitution made by Ange Postecoglou is at the centre of criticism by Peter Grant after a costly 2-0 defeat to RB Leipzig.
The Hoops went down to the Bundesliga side on Champions League Group F matchday four to ensure they can't make this year's last 16. A glimmer of hope in the form of finishing third and qualifying for the Europa League is still there but overall, Celtic have their European hopes for this season dangling by a thread.
Manager Postecoglou brought off Kyogo Furuhashi, Reo Hatate and Sead Haksabanovic for David Turnbull, Aaron Mooy and Georgios Giakoumakis on 64 minutes, and less than 10 minutes they were a goal down. Parkhead hero Grant told Sportsound that was a moment his beloved club lived to rue: "Celtic lost a bit with the substitutions and that is disappointing. In that five minute period (after the triple change) they looked all over the place.