The Egyptian put the icing on the cake with an excellent goal on the hour mark at the Olympiastadion, adding to efforts from Wijnaldum and Dominic Solanke.
Surging forward to latch on to Philippe Coutinho‘s expertly weighted long ball, Salah was left to make the simplest of finishes to put Liverpool on their way to a resounding victory.
That was Salah’s third goal of pre-season, after his efforts against Wigan Athletic and Leicester City, and it highlighted the quality he possesses.
Speaking after the game, Wijnaldum attested to the quality of Liverpool’s new No. 11, both on and off the field.
“He’s really flying. I didn’t see his goal because I was in the changing room, but I heard that it was a good goal!” he told LFCTV.
“What I will say is that he’s settled in real good, he’s not only a great player but also a great person.
“That makes it easier for him, but also for us to accept him.
“Since the moment he came here, he felt free to be himself, so it’s a good thing for us.
Saturday was the first opportunity for Klopp to call upon both of his first-choice wingers, with Sadio Mane returning to the fold after a long-term knee injury.
Klopp opted against fielding Salah and Mane together, however, with both playing 45 minutes in Berlin, forcing supporters to continue to wait to witness their dovetailing talents.
Wijnaldum has already experienced this in training, though, and explained how Salah and Mane can prove a major threat to defences in 2017/18.
“It’s always good to play with good players, but when they’re also quick, as you can see with Sadio and Mo, it makes it easier for us,” he said.
“The opponents have to be aware of two quick players, and that creates space somewhere else.
“So everyone can profit from the quality of those players.”
The Reds’ next pre-season outing comes against Bayern Munich on August 1, and it could be that Klopp deploys his new wide tandem together for the first time at the Allianz Arena.