The Reds sustained their second defeat in a row in the top flight as they fell to a 3-1 defeat to the Hammers on Saturday.
He told reporters: "When you speak to the top man, which was Fergie, you have got to have two teams. You've got to have one for Europe and one for the Premier League, particularly the game after.
"A Premier League game can't have the same significance as a Champions League game. Like Brendan Rodgers says, it becomes your bread and butter, the Champions League's your glory."
West Ham are eighth in the Premier League following their victory over Liverpool.