Manchester United boss Ole Gunnar Solskjaer says there'll be no underestimating Southampton on Sunday.
United thumped Saints 9-0 last season.
He said, "That game [last season's 9-0 win] was a one off. That's a special game when you have a lad sent off in the first minute. With Ralph's teams you get high energy, high pressing and belief in themselves. They give you a great challenge. We know every time we travel down there it's a very difficult game.
"You want to silence the home crowd. I know that's not going to happen when it's the first game at St. Mary's in 18 months, it will be loud, but we have to do that.
"We have to manage the game so that the away fans are the ones that are heard."