Personally thought he was decent tonight. Any failing s he may have had were largely down to two factors for me.
One, Silva & De Bruyne played in the same manor as they do when Fernandinho plays.
Two, they had a front four that were 'cheating' on their work rate.
Number one related to occasional overloads where some have pointed out he can be weak or cheap in possession. But Arsenal were leaving Ramsey, Ozil & Micky the stroller all occupying the space in front of the back 4. A lot for one man to cover.
Number two lead to them to leaving our attacking 5 vs their back 5. Who we ripped apart.
The clear positive was his discipline to be largely positionally sound in an unfamiliar position.
The negative for me, he didn't show for Ederson as well as Fernandinho does.