Alexander-Arnold squared the ball for Jota to finish and then delivered an exquisite pass that led to Mohamed Salah earning and scoring a penalty to secure the points.
On the full-back's delivery, Jota commented: "Two [great passes]. For the penalty, a great pass as well.
"We know he has great delivery and we just have to be ready for it."
Jota's goal was Liverpool's 10,000th in all competitions.
"Obviously I'm happy to score and to help the team to achieve the win.
"Achieving that mark is always a good thing but I'm more happy with the victory today.
"After a good away win, it's important to keep on adding points and we did our job. We get the three points, that's most important, and now we [need to be] ready for the next game."