Lallana might be the more influential player but we have proper cover for him in Coutinho. But none of our players can be highly mobile, keep the shape and work through tight spaces like Wijnaldum does in that deeper role. Putting Coutinho so deep would be silly and there isn't really anyone else who could tick all of those boxes. We lose quite a lot, whoever we put in wijnaldum's spot.
I think we can probably get away with using Can there for this game. Wijnaldum's key attributes for the role are agility, mobility and positional intelligence, which help us to break a press and gives us another player going forward who's a threat via passing, runs into the box and finishing. In short, we have a great two-way player.
I don't think we need a two way player as much against United at home. I expect Mourinho to be parking the bus, so I can't see us being pressed nearly as much as we would be against another team, like Spurs or City. That means Can will hopefully have a bit more freedom and time to receive the ball from the CBs or Henderson, and make his driving runs deep into the United half, which is his strength, without having to worry as much about losing it in our half.
