United are favourites to win the game, as Liverpool are currently struggling with their worst run of form for 22 years.
Rio told Sky Sports News: “The pressure is on both teams. We both want to win. The league is going to be a tight league this season.
“At the end of the day, form goes out the window in these games. It is like a cup game. It doesn’t matter how well you’re playing at the time. Form goes out the window and it is who plays best on the day.”
