Slotting in alongside David Luiz in central defence, the Spaniard played his part in a crucial shut out, and Mikel Arteta was pleased with the way he is adapting to the rigours of the Premier League.
The head coach spoke to the media after the 1-0 win over West Ham, and also discussed his team selection and coming up against his former boss.
Well, I have two strikers at the moment and they are making life difficult for me, but at the same time it is very good. They are both scoring, both in a good moment.