Kenny Dalglish or Eric Cantona? Steven Gerrard or Sir Bobby Charlton?
Picking the best post-war XI to have played for Liverpool or Manchester United is never going to be easy - but now is your chance to do so.
Use our team selector to pick what you think is the best XI, then share it with your friends.
Shortlist compiled by BBC Sport chief football writer Phil McNulty.
My all-time Liverpool-Man Utd XI
The impossible job? Probably. Use our shortlist and pick who you think would make the greatest combined post-war Liverpool-Manchester United XI.