Ever since he can remember, Alexander-Arnold has been a Liverpool fan.
From living just five minutes away from the team's training ground -- he remembers asking his mom to take him and his siblings to catch a glimpse of their "idols" through the cracks in the walls on their days off from school -- to watching them at the weekends, he was in love with the club from a young age.
In celebration of Liverpool's dramatic Champions League win in 2005, Alexander-Arnold was one of thousands who took to the city's streets to welcome home their heroes in the open-top bus parade.
Although he was a massive fan, his own introduction at the club was one of pure luck. "It was like a half-term camp and the invite got sent to my school and it was like: 'So who wants to go?'" he said.
In his 161 appearances in the Premier League, he's scored 10 goals, provided 45 assists and has a remarkable record of winning 114 games and only losing 19 times.
But despite that record, such has been the brilliance of Manchester City under Pep Guardiola, Alexander-Arnold and Liverpool's trophy winning has been stymied.
Yes, they've won plenty during his time in the first team, but the Reds have been narrowly pipped to the Premier League title four times in the last five years -- twice by just one point.
The nip-and-tuck battle between the two English juggernauts has become must-watch TV over the course of a season, with Alexander-Arnold admitting playing Man City is Liverpool's "biggest game of the season," despite traditionally having more intense rivalries with Everton and Manchester United.
"I think, historically, there's always going to be that tension and the rivalries with Everton and with United. But I think right now, it's for different reasons. I think there's always going to be a dislike with Liverpool and Everton and Man United," he said.
"It's always going to be that no matter where either team finishes in the league, whenever it's going on, there are always very heated games and both fans really want to win it the most. But I think for different reasons, now, Man City is the biggest game of season, the best team in England, one of, if not the, best team in the world as well.
"And, of course, they're the team that set the pace, set the benchmark for the rest of the league. Four leagues in five years is something that not many teams can say we've done. So it's difficult for us to look past them and look for anywhere else as motivation. Our motivation is if we stay in and around City, then over the last four or five years, you're in a good place."
Although last year was another successful season for Liverpool and Alexander-Arnold personally -- with both FA Cup and League Cup winners medals added to the trophy cabinet -- it ended on a sour note.
In the season finale – the Champions League final in Paris which Liverpool lost 1-0 – chaos involving Liverpool fans outside the stadium marred the occasion.
The game was delayed by 35 minutes as Liverpool fans struggled to get into the Stade de France, with the French police using tear gas on fans held in tightly packed areas.
After the match, despite the club's account of events and details from the fans, Reds fans were blamed in part for the disruption, with French Interior Minister Gerald Darmanin saying "that the disturbances caused were related to a massive influx of spectators and an extensive number of false tickets."
However, a report from the French Senate cleared Liverpool fans of any responsibility in July, instead blaming decision-making from French officials.
Senator Laurent Lafon, president of the Culture, Education and Communication Commission, which co-authored the report, blamed the violent scenes at the final on "a series of malfunctions that occurred in a rather vague administrative and decision-making framework."
And for Alexander-Arnold and the rest of his teammates, he admits the whole situation was "strange."
"The messages that were broadcast through the stadium was late fan arrivals and stuff like that ... and you believe what you hear and see in those situations," he said.
"Then it wasn't until after the game, obviously, we actually found out the truth and what happened, what went on. But I think the way the fans have dealt with it -- when it happened, during the game and after the game and the following months afterwards -- has been outstanding.
"It's something us as players and as a club, we're really proud of, the way they've made sure the truth has come out. They've made sure that the fans are not just getting blamed for stuff that they've done." (CNN)