Koeman: The referee should've given penalty in Messi episode

"If they whistle for the first penalty, they must whistle for what they [Juventus] did to Messi," Ronald Koeman said after the game.

"But it's no excuse, we didn't do well in the first half," the Dutchman added.

Let's take a look at what actually happened in the box when there was a potential penalty check by VAR.

Jordi Alba with the ball, Messi running into the box

Alba passes the ball to Messi while Weston McKennie puts his arm on Messi's one

McKennie puts his arm down, Messi starts falling

Messi attempts the shot while falling

And a different angle

This doesn't seem like a pen but given that Cristiano's first was way too controversial, why not?