Not many players can make themselves a fans' favourite before they play a minute of competitive football for the club, but then not many players score a scissor kick on their pre-season debut against Manchester United either.
Ever since that moment, Liverpool fans have been waiting to see Xherdan Shaqiri unleashed in the Premier League. A couple of cameos showed promise and his
"I said to Shaq that I have never taken a player off at half-time after such an influential half but we wanted more control. He wasn't injured," said Jurgen Klopp after the match.
It may sound silly to suggest that a team winning 3-0 needed "more control", but Southampton had their moments in the first half. Pierre-Emile Hojbjerg could easily have reduced the deficit with a scuffed shot from 12 yards out, and there were one or two other moments of concern for Liverpool as well.
Taking Shaqiri off may have reduced Liverpool's attacking threat, but it did the same to Southampton. With the Reds reverting to 4-3-3 and Milner being his usual industrious self in midfield, the Saints barely had a sniff of goal. Not until the 90th minute did Charlie Austin force Alisson into his first save of the day.
What Klopp recognised was that Liverpool did not need to make an attacking statement. Everybody knows that this is a team which can blow any opponent away on their day. It was a much more powerful statement to keep a clean sheet, particularly with Joel Matip making his first start of the season at centre back.
When he was at Borussia Dortmund, Klopp described his style of football as "heavy metal" compared to the "orchestra" of Arsene Wenger's Arsenal. It's a very apt metaphor. Klopp's teams turn up the noise on their opponents, drowning them out until they are forced to submit.
But heavy metal is about letting go of the handlebars and going hell for leather. It's certainly not what you'd call controlled, and that lack of control - that refusal to sit back and accept 2-0 or 3-0 - is one of the reasons Liverpool fans love their manager. It's also one of his greatest weaknesses.
In 2016, with Liverpool 3-1 up away at Bournemouth, Sadio Mane was forced off with an injury. Klopp could have brought on Ragnar Klavan, gone to five at the back, and closed the game down to ensure victory. Instead, he made a like for like switch, bringing on Adam Lallana. It was 3-3 within ten minutes and Liverpool ended up losing 4-3.
As recently as April, Klopp still hadn't learnt his lesson.
Klopp is a man to live and die by his footballing principles, but even he knows that if Liverpool are to win trophies, the time has come to swallow his pride and focus on substance over style. The decision to take Shaqiri off was an implicit acknowledgement of this fact.
Shaqiri was apparently a little subdued when he left Anfield on Saturday. At Stoke, his superior ability meant that he was basically undroppable, even when out of form. There are no such guarantees at Liverpool, and Shaqiri will probably find himself back on the bench for the trip to Stamford Bridge next Saturday.
"Great offensively, needs a little work defensively," said Klopp of Shaqiri.
There's a saying in American Football: offence wins games, defence wins championships. That may not tally with Klopp's heavy metal philosophy, but Liverpool fans could do with a bit of easy listening football from time to time.