The German celebrated signing a new six-year contract with a trip to Prenton Park, where he put his side through their paces in the first of nine pre-season friendlies.
Taking on a positive Tranmere side, a youthful Reds lineup endured an end-to-end contest in the first half.
Academy midfielder Ovie Ejaria lined up behind Firmino in the central role in Klopp’s attacking line, and impressed from the start, showcasing an awareness that belied his 18 years.
It was the bright and incisive Alexander-Arnold who set up the Reds’ winner in the 79th minute, bursting forward towards the edge of the box before laying the ball into the path of Ings, who was captaining the Reds in the second half.
After missing a number of good chances in the minutes preceding this opening, Ings powered the ball past former Everton goalkeeper Iain Turner to secure victory.
Meanwhile, Turner’s opposite number, Adam Bogdan, had little more to do than pick the travelling supporters’ flares out of his penalty area.
The win will have left Klopp content, as he witnessed his produced a strong performance in what he deemed a glorified training session—with the German looking for his side to build their fitness ahead of 2016/17.
Next up for the Reds is a trip to take on Fleetwood Town at Highbury Stadium on July 13.