I thought cahill did ok and I think he makes less mistakes and uses the ball better than Christenson. So if Rudiger is out, and he will be, then for me its definitely cahill in the back four. As a matter of fact I would question whether Ampadu might not do better than Christenson.
Also I think Dave has looked off the boil recently, despite his assist for Hazards goal during the week and I'd actually consider going with Zappa who has a lot of speed.
If Pedro is injured then its either willian or moses and sarri will go with willian. Willian needs to go outside his fullback more often but that just won't happen against robertson. Willian also needs to reduce his misplaced passes.
Morata or Giroud? Its a toss up for me. I like it better when Morata starts and Giroud comes off the bench. Neither scores very often that's for sure.
Barkely has been playing great this season adding a lot of good running in the midfield and if he doesn't start he will be a good sub. Fab another option from the bench if its the creative pass that's needed rather than the direct running.
Liverpool will improve their team more than we will compared to the cup match so it will be tough, but we do have home ground advantage.
This will be a very tough game and I'd take a draw if offered right now. At the same time I'm looking forward to it and if we play our best we will be competitive a a minimum.
As teams work out our patterns through the centre we will have to move to using the wings more to open up the space.