It was a moment he will regret - but former coach Simon Donnelly insists an error against Celtic has only made John Souttar's mindset at Rangers sharper.
The defender bounced back from an injury-hit start to the season with a run of eight straight matches in the Premiership, having made one start before that stretch, but the first in that sequence was a sobering experience. A casual backpass by Souttar put Jota in to score Celtic's third of the day and that 3-2 defeat all but ended any Rangers hopes of a dramatic title comeback.
Former Hoops player Donnelly coached the centre-back during his time as Dundee United assistant manager, and knows that the mentality he has developed in moments of adversity is a huge strength which could prove key as boss Michael Beale revamps the Ibrox squad. He told Clyde Superscoreboard: "I think John will go on to become a really successful player at Rangers. I worked with him closely in the early stages of his career and he has got the mentality. Nothing shows that more than the mistake he made at Celtic Park.
