Who the English teams could get in the last 16

The draw for the last 16 is on Monday. This is who the English teams may play:

Manchester United will play either:

Galatasaray, Olympiakos, Schalke, Zenit St Petersburg or Milan

Chelsea will play either:

Bayer Leverkusen, Galatasaray, Olympiakos, Zenit St Petersburg or Milan

Manchester City will play either:

Real Madrid, PSG, Dortmund, Atletico Madrid or Barcelona

Arsenal will play either:

Real Madrid, PSG, Bayern Munich, Atletico Madrid or Barcelona

Shows how much easier it looks when you finish top of the Group.

I'm working on the other possibilities, but the Geezer has been busy!