He's had some injury history and some set backs from those recoveries. He's far too valuable for them to rush him back. So sure, he could resume light training in 4 weeks. Probably full training at 6. That would put him on course to be back by the 1/19 match against Palace. And I could very well see them holding off until 1/30 against Leceister.
Things could change with injuries or suspensions of course, but Lovren, Matip, Clyne, Milner and all capable backups. And I suspect that there will be strong consideration to play Fabinho as CB or RB as well.
The club said "up to six weeks," with a potential earlier return. Either way, I'd be shocked if he isn't back for the round of 16 in mid-February.
Matip broke his collarbone, so it looks like Lovren and VVD are going to be rather busy.
Or so one of the beat writers on twitter claimed. I would think Fabinho or Milner? Hell, Milner is probably the 3rd goalie, right?
I don't think Milner has the height to play CB. That being said, I wouldn't be shocked if Milner was successful.