If you mean the other one tracking back apart from Pique and Umtiti. That's Trincao, not Pedri.
And he ran, fastest of them all.
I mean Pedri, who is looking very much like a lower league player just about to call for a sub in the way he decelerates with a jump and then uses his arms to accerelate in a way to show frustration and effort, but looks as if he's running in water. I think Koeman likes that body language.
Anyway, Pedri won a lot of balls anyway yesterday, and I don't think it is the most important thing for every player to sprint after the ball all the time. Better to rest, be well positioned, and look to not lose it as often, so you can decide when to run or not.