He put in an absolutely heroic shift for the team last night.
He's one of the least physically prepared with no preseason or international games, and yet he was forced to play 90 because both Zinchenko and Cancelo are injured.
He was up against the fastest winger in the league who's 4 games into the season and miles fitter.
He was on a bullshit yellow card.
There are no left backs in the world who are going to have an easy game in that situation.
In the first half, he kept Traore completely quiet, in part because he wasn't knackered, but also because our midfield dominance meant they couldn't get enough time in possession to set up Traore making those runs in behind. After an hour, we absolutely wilted as a team, and they started dominating possession and setting up those 1v1's, and it got ugly for a bit.
But he did well. He kept his head, didn't get baited into diving in, didn't let Traore engage him in a physical fight, he just dropped off and made sure he was present to make things harder, block crosses, and cover CB when Aké went out to meet Traore a few times.
After 5-10 scary minutes, Pep reorganised the midfield to get him some help and their threat stopped coming down that side in open play.
If anyone thinks we're going to find a LB who will do a lot better than Mendy last night in those circumstances, you're going to be disappointed. Most would have gotten themselves sent off.