A win for United on Wednesday night at Old Trafford would be a massive blow for Pep Guardiola's men in their title ambitions, while a defeat would most likely ensure the title remains in Manchester.
And Walker revealed in an interview with the Telegraph, that he has been approached by United supporters backing their city rivals City to win the league.
“United fans are in a difficult situation obviously,” he said. “When I’m out and about or walking my dogs, United fans are coming up to me saying, ‘We’d rather City win the league than Liverpool.
“It’s strange to hear but I can assure you the United players aren’t going to leave a red carpet and say, ‘Go on City, score past us.
“They’re going to make it difficult because it’s a game of football and they’re fighting for the top four as well so they need the points.