Ally McCoist has warned Rangers boss Russell Martin that he’s “in big trouble” as the Ibrox crowd continues to rally against the under-fire manager. Their Europa League adventure got off to a nightmare start with a drab 1-0 loss to Genk, and the home crowd made it brutally clear they’ve had enough of Martin in charge. It was another chaotic night that included a VAR controversy, a red card, and the killer blow delivered by none other than a former Celtic striker.