The fierce Glasgow rivals, meeting for the second time in the space of a week after last Sunday’s thrilling 2-2 draw in the Scottish Premiership, could not be separated through 120 minutes in a frantic stalemate that was high on tension but notably low on quality. Daizen Maeda saw a header for Celtic before half-time ruled out for a fractional offside against stand-in captain Liam Scales, while Emmanuel Fernandez bundled in for Rangers in extra time but the goal was quickly disallowed for handball.