IMO right now he's third choice behind Kompany and Stones.
I haven't seen enough of Mangala yet but he could easily be behind him as well.
No pace, suspect positioning, dives in too often, he is targeted every game because opposing teams know he is the weak link. Last season Clichy was targeted every game because he was the weakest link by far. Now teams are targeting Otamendi. Hopefully this is his last season at the club. I am praying for a miracle and we can sell him to some desperate club in January while bringing in an upgrade.
Mangala & Stones should start together on Wednesday, we need to see Mangala's level.
Otamendi was terrible vs Liverpool, Salah made a mockery of him, needs benching.