The League One side's manager was incensed after the former England international was sent off in their 3-1 defeat against Barnsley, as they crashed out at the fifth round
MK Dons manager Karl Robinson has heavily criticised the decision to send off Alan Smith in the closing stages of their 3-1 FA Cup defeat against Barnsley.
The 32-year-old picked up a red card in injury time with referee Michael Jones deeming his aerial challenge with Rory Delap dangerous.
The contentious nature of the dismissal only exacerbated Robinson's woes as it topped off a disappointing FA Cup fifth-round exit, with a Craig Dagnall double and Marlon Harewood guiding the Championship side through to the quarter-finals.
"I didn't even know it was a foul but you see Alan Smith going to try and compete and right away ultimately the referee thinks 'that's Alan Smith, he has tried to do him, sending off'," he told reporters.
"You could see it and, by the way, how quick did he go for his card? It looked like he couldn't wait to do it but if he sticks to his report he will know he has made a big error."
However, Robinson's ire was not only directed at the referee, as he criticised his team's below-par performance, particularly of that on show in the first half.
"I thought in the first half we were poor. We were as bad as we have been but the second half was more like us, tried to retain the ball and play the game right," he continued.
"It was a very split game, they were the better team in the first half and we were better in the second half."