Expect Monaco to line up in their usual 4-2-3-1, with the double pivot shielding a back four that likes to step up. Filipe Luís wants his full-backs high and his number ten drifting into the half-spaces — that's where they'll hurt Marseille. The wide men will stretch the pitch, and the striker will feed off scraps in the box. Marseille, under their current setup, are expected to stick with a 4-3-3, with a midfield three that can be overrun if they're not careful. Højbjerg will sit deep, but the two ahead of him need to work harder than they did against Strasbourg. The key battle will be in the middle of the park: Monaco's double pivot versus Marseille's three. If Monaco can win that dogfight, they'll control the tempo and feed their wide runners. Marseille will try to hit on the break, using Aubameyang's movement and Greenwood's directness. But if Monaco press high and squeeze the pitch, Marseille's back line — which looked shaky at times — will be under constant pressure. Set pieces could be a factor too; Monaco have height in the box, and Marseille's zonal marking has been suspect.