Looks like it could just be a bog standard 4-3-3, with Laporte as LB, switching to a 3-4-3 with the ball and Walker sliding forward into RM, or tucking into midfield along Ferna to solidify the defensive middle of the park and release KDB and Silva (3-2-2-3).
Will be interesting to see if Bolasie and Walcott can push us back along the flanks, or whether we turn them into defensive wide midfielders. Big Sam knows that pushing us back is the only way to affect our game, so it will be interesting to see how the teams actually set up on the ball. If we do actually play the 3 across the back, it will be a big game for Sané as he seeks to keep Walcott quiet down their right side, our left.