That left back is an utter clown, he always has been. Amazed Pep was ever interested in him.
The problem with Saka is that there isn't that much a ref can do about it. 99% of the time they are not bad fouls, just shoves or kicks or shirt pulls to stop him getting anywhere. It is never going to stop and refs can book the guy eventually but it takes 3 or 4 fouls before he can, realistically.
We've put a lot of miles on Saka's legs in the last couple of years so it isn't surprising to see him tired. We really do need to think about how we can offer him a break next season. I expect Arteta will be looking at options for that over the summer.
The next phase of our development is going to be maintaining consistent performance alongside limited but regular rotation. Every side has players they need to field pretty much every week but we have too many of them- White, Gabriel, Saliba, Rice, Odegaard, Saka and now Havertz. City arguably have only four- Dias, Rodri, De Bruyne and Haaland.