It was Saints' first home defeat of the season and their third loss in succession - hardly the best preparation for Saturday's encounter with high-flying Manchester City.
"It's such a strange feeling now," Lallana told Saints Player. "It's just one of those games.
"I can't wait to go back and play Villa because I thought they didn't deserve to get anything out of the game and we deserved to get a result. I want to go there later on in the season and get three points.
"We've got a big game on Saturday, massive in fact.
"It's not that we're not playing well. We are playing well. We might have a couple of knocks on the back of this game, so we've just got to assess everyone [on Thursday].
"We've got to prepare and get everyone as fit as we can. It is a big month. We've proved we can beat Man City. We did last season, so let's do it again."
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