Former Premier League ref Mark Clattenburg insists Liverpool fullback Andrew Robertson's shove on Lionel Messi was never a red card offence.

Robertson pushed the grounded Barcelona star in the first-half of Liverpool's 4-0 Champions League victory on Tuesday night.

Clattenburg wrote for the Daily Mail: "Robertson was also involved in an incident with Messi, when he pushed the Barca man in the back of the head with two hands.

"If referee Cuneyt Cakir had seen it, then a yellow would have been shown. VAR will have looked to see if the contact deserved red, but will have seen it was merely a push and not violent.

"VAR doesn't get involved in missed yellows so did not tell Cakir, one of the best in the world, about it."