Swansea were pretty poor against Everton. They had problems playing the ball out, Everton's pressing was very effective.  This is why even though the 4-3-3 worked well against Arsenal, the regular 4-2-3-1 should be played against Swansea.   I think Eto'o's workrate would be crucial in this game, I hope he starts.  As far I see Routledge really works the channells, Luiz will remain on the bench, Terry and Cahill will start in the centre of defence.