Celtic's players will be having nightmares about Lionel Messi following their thumping 7-0 defeat to Barcelona in the Champions League on Tuesday night.
For 90 minutes the Argentine - alongside Luis Suarez and Neymar - terrorised Brendan Rodgers' side and provided nothing short of an attacking masterclass.
Messi opened the scoring with a wonderful drive into the top-right corner from inside the box, then added a second following some beautiful link-up play with Neymar, before sealing a hat-trick from close range.
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The way Barcelona tore Celtic apart really was something to be behold.
In fact, so brilliant were the La Liga champions that Rodgers claimed his players should feel "no embarrassment" about losing by such a hefty margin.
The night ultimately belonged to Messi, though, after making Champions League history.
By scoring three goals, the 29-year-old became the first player to score six hat-tricks in the competition, moving above rival Cristiano Ronaldo (5).
But what did manager Luis Enrique make of Messi's record-breaking performance? "Total football" is how he described it.
He said, per Goal: "He plays everywhere because he has freedom. If you play him as a six, an eight or a 10, he's the best in the world.
"That's why he's the best player of all time, without a doubt - for his numbers and his footballing vision. He is total football."
Messi, who has 86 Champions League goals to his name, will now have Ronaldo's record of 94 in his sights.
There really was no stopping Barcelona at the Camp Nou and Celtic manager Rodgers realises that.
"There can be no embarrassment because they do that to much better teams than ourselves," he said, per BBC Sport. "Tonight is one of those tough nights that you take at this level. Of course it's never nice professionally."
And on the quality of 'MSN', the Northern Irishman added: "It's a front three that really can occupy as many players as you want.
"They are world-class players and they have shown big quality this evening."