The Reds managed an admirable 1-1 draw against the current champions at the weekend and it was Alexander-Arnold's delightful strike that earned them a point.
The right-back had made one of his trademark forays forward, receiving the ball just inside the penalty area from Mohamed Salah before rifling a low drive beyond Ederson in the 80th minute.
Alexander-Arnold was Liverpool's shining light at the Etihad, impressing in his hybrid defensive role that also asks him to step into midfield and help orchestrate attacks.
Liverpool's No. 66 was also kept honest defensively by Man City winger Jeremy Doku, the pacy Belgian relentless in running at the England international at every opportunity.
There was the odd uncertain moment, as would be the case for any full-back up against Doku, but Alexander-Arnold dealt with his threat remarkably well.
It was an all-action performance and one that the underlying numbers suggest was exceptional - and Steven Gerrard-esque.
According to Opta's Michael Reid, Alexander-Arnold won possession more frequently (10 times), contested more duels (15) and made more final-third passes (8) than any other Liverpool player against Man City.
As a result, he is the first Liverpool player to score and record as many contributions as he did in all the aforementioned metrics in a Premier League match since Gerrard against Fulham in 2007.
While a somewhat niche stat, it highlights just how pivotal Alexander-Arnold was to Liverpool's success at the Etihad and demonstrates his ability in both the attacking and defensive third.
Given he is being asked to perform two very different roles in and out of possession, there are few players with the tactical intelligence to pull off such an impressive display against Man City.
Hopefully, Alexander-Arnold's form can continue as the season progresses and he becomes even more decisive in his unique role in the Liverpool team.