The captain has played a key role in the club's magnificent start to the season, as they head into the latest international break holding onto a Champions League spot.
"The manager is installing that in us," he told the Daily Echo. "He's installing that lack of fear, especially when you go and play the top teams. You go out and enjoy it, instead of being timid.
"It's rubbing off on all the lads. We'll go to Old Trafford and we're going to be confident. We'll really look forward to that."
Lallana added: "We're picking up momentum. (We've got) a nice couple of weeks of training for the lads that have not got internationals, then we'll go to Old Trafford and look for the win."
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