I think it depends on the fitness of Bailey - that strapping on his leg has increased over the last few games and he was looking really tired by the time he came off yesterday.
I wouldn't mind him coming off the bench v Chelsea and moving McGinn or Tielemans slightly further forward, with Luiz coming back in to his usual role. Chelsea also tend to play with quite a compact, energetic midfield with Gallagher, Caicedo and Enzo behind so we could perhaps do with an extra man in there.