In late April, Alexander-Arnold announced his intention to leave the club upon the expiry of his contract that summer before departing for Real Madrid in what was one of the most controversial moves in recent years.
Trent will have expected booing
Alexander-Arnold, who started on the bench, came on to mass boos from the home supporters who made their frustrations known before the game by vandalising his mural outside the ground.
Now, speaking on the Stick To Football podcast, a number of legends have discussed his return including Roy Keane:
"The reputation of Liverpool fans is that they're loyal and a level up from most supporters. But I think for any player to go back, to boo him, people pay their money to go and that's fine, you're not going to argue with supporters but.."
Ian Wright interrupted: "You know what Roy, when you look at him, when he was a youngster, he'd have been dreaming of winning all those things for Liverpool. He'd think 'one day I'll leave and I can come back and it will be great', but the fact is when he was getting ready to leave, that is what he was thinking about.
"So I was more concerned for him when Liverpool (supporters) were booing him when he was there. He would have expected that last night, especially with the way he left, and that was the saddest thing that he had to deal with that.
"But that's what happens especially when you choose somebody else, especially over Liverpool, they're going to hold that against you."
Fans need to move on
Later, Keane replied and suggested that the booing wasn’t needed and that supporters should potentially move on from the fullback, who was ineffective on the night when compared to Liverpool's replacement Conor Bradley who picked up man of the match.
"Of course, but Liverpool fans will obviously think 'we are the biggest club in the world' like all supporters. I'm not saying you give him the thumbs up for leaving you, but why would you go to a match and boo a lad who has played 260/270 games, stats are fantastic.
"You don't have to wish him luck in Madrid but to go to the effort of thinking, 'I'm going to boo this kid' as a local lad and Liverpool fans for some reason think we've got class, no Liverpool fans have to have a good look at themselves.
"The beauty with Trent over the last year or two is that he has said very little, he's not been one to say, 'oh I'd love to stay here', he has actually kept his mouth shut and sometimes that's not a bad thing to do. How many times do you see players say, 'oh I love this club' and then they leave. He kept it cool.
"He probably left a better team to go to a worse team.”