Hodgson is uncertain whether United's troubles will still be on Rooney's mind in Brazil if their season doesn't improve.
He said: "If you want a clear answer you might have to go to Wayne himself and say 'look Wayne if you have a bad season with Man United and things don't go well for the club is that going to make it difficult for you, for England?'
"What I hope he'd say is 'nope, when I go to the World Cup with England it's something different and I can compartmentalise - whatever happens at United is not going to affect me here'.
"That's what I want to hear.
"At the moment I won't talk to him about that because the season is not over yet and there's a lot of football to be played."
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