I think we need Iva to have aerial presence when defending corners, but we need Azpi's defensive ability to deal with Ashley Young's crosses. And we can't play him on the left as I don't want to see him trying to win an aerial duel at the posts with that geezer. We need Luis too as if they play Blind and Fellaini together on Hazard's side, Hazard will be squeezed out of the game so we'll need Luis to pull men away and allow him to work. So we'll have Iva as RW, Azpi RB, Luis LB. Not sure if we'll need Zouma in midfield, but thinking about it it may be a good idea allowing Matic and Cesc to press higher. And if that isn't enough, Oscar will be Cesc's replacement, especially if we're holding a lead.