Liverpool defender Trent Alexander-Arnold says Sunday's huge Premier League game at Old Trafford offers him a chance at personal redemption.
Liverpool lost the corresponding fixture last season 2-1 and Alexander-Arnold was given a hard time by Marcus Rashford, who scored both the United goals.
"I still use it as a learning point," said Alexander-Arnold.
"I look back on the harder games, learn what I didn't do well and what I could have done better.
"The United game was definitely one of those games and so, rather than let it get me down, it was important to use it as a positive and see it as a learning step to get better.
"It is important to put it behind you.
"Alex (Inglethorpe, academy director at Liverpool) helped me with that, the manager here (Jurgen Klopp) and also the people around me who support me.
"They just guided me through the tough time around that game."
Perceived enmity between Liverpool and Man United players appears to be a thing of the past, with Alexander-Arnold linking up successfully with the likes of Rashford and Jesse Lingard when on England duty - but those friendships will be forgotten on Sunday.
Alexander-Arnold said: "I think probably the England set-up has helped everyone overcome the bitter rivalries.
"That has probably helped us do so well internationally.
"But, when you are not on international duty, it is normal business as usual.
"You focus on your job and on the day there will be no smiles."