It was a blunder from Motherwell defender Stephen McManus that led to Rangers’ 89th-minute winner last Saturday.
The centre-back’s misplaced pass was snaffled up by Emerson Hyndman, who sent Kenny Miller free to fire home.
“When the second goal went in, as soon as the ball left my boot, I could see it happening that they were going to score,” the former Celtic, Middlesbrough and Scotland player said. “And at that point in the game it was difficult. That’s probably the first time in my career I can remember something like that.
“We were absolutely devastated as a group. That’s probably the worst I have ever felt in my full career after a game. At 34, you have experienced quite a lot in your career, you have experienced the highs of winning leagues, the lows of losing leagues, winning cups, losing cups, pretty much everything. But that was a first for me, Saturday was the toughest thing I have had to take. But when you have had a long career and a successful career, you take the highs with the lows.”