Southampton boss Ralph Hasenhuttl insists they're not intimidated facing Manchester United.
United go into the game 17 matches unbeaten.
Hasenhuttl said: “They have at the moment an unbelievable run and this is exactly what we like the most because then we can see how good we are and we can go into this challenge and be competitive against such an opponent.
“This is exactly the challenge we need. If we want to get better, we need to challenges against such teams. We can learn a lot.
“I think against Manchester City we learned a lot about how good they are in possession and what they can do – we need these games.
“I once said that if you want to be lion then you have to fight with lions, and I think this is exactly what we are looking for."
