The Egyptian slotted into an empty net from 12 yards after Roberto Firmino and Philippe Coutinho linked up at the end of the first-half.
It brought the scores level after Alex Gilbey gave the hosts the lead in the early stages.
Liverpool fielded a different XI in each half, with no player on the pitch for more than 45 minutes.
Here are five things we learned from the game…
1. Salah looks ready to impress
Liverpool fans have been made to wait to see new signing Salah after he was forced to miss the clash with Tranmere this week to complete an immigration procedure.
Salah immediately looks a brighter player than when he had his first spell in the Premier League with Chelsea.
Ok, he’s only facing off against Wigan, but it is a solid enough start for the Egyptian.
He showed little glimpses of his pace throughout the evening, which will add another dimension to the Liverpool front line.
The bursting run away from defender Reece James just one minute into the game showcased just that.
His desire to play forward every time he gets the ball looks really exciting.
2. Woodburn could be the real deal
In theory, Woodburn is an out-and-out striker, but he was used in a deeper role during the game on Friday night.
It actually suited him well.
For such a young lad, his technical ability looks pretty on the money. With experience, he’ll learn how to avoid drifting out of matches and sustain his involvment.
He’s happy to take people on and has an initial burst of pace which suited him well against the rather lethargic Wigan central players.
Woodburn is deceptively strong despite his slight figure and has the real potential to stake a claim for a place in the first-team starting XI by the end of his season.
He’s not even 18 years old until October…
3. Firmino and Coutinho show what pre-season is for
It looks like these two have left their first touch with them in Brazil.
Both Firmino and Coutinho looked off the pace, which is somewhat understandable given the fact it is only the second game of pre-season – and the first for Coutinho.
Thankfully, just before the break we saw a little look of them back at their best, as they combined to set up Salah for his opening Liverpool goal.
A through ball from Coutinho was met by Firmino, who put an behind an earlier fluffed square pass behind him to pick out Salah, who tapped into the empty net.
4. Solanke will have his work cut out
Moving from Chelsea to Liverpool is on paper a great move for Dominic Solanke, but he will have his work cut out if he wants to break into the Liverpool team.
With Origi, Firmino, Salah, Mane, Coutinho, Sturridge and possibly even Woodburn ahead of him in the pecking order right now, Solanke has to really impress to work his way into the team.
On Friday night, he didn’t do loads to force his way into Klopp’s thinking.
Despite the second half being a lot slower than the first, Solanke struggled to have much of a say in proceedings going forward.
5. Klopp’s goalkeeping situation is no clearer
In most squads, it’s pretty clear who the No.1 goalkeeper should be.
But Jurgen Klopp has a pretty unique situation where both of his goalkeepers are probably right on a par – and he looks no closer to deciding who indeed is his preferred stopper.
With 45 minutes to their name each on Friday evening, they both look equally as capable of taking the role of No.1
Admittedly, they aren’t world class. But they are both solid.
Simon Mignolet looked sharp in the first-half and Loris Karius good with his feet in the second. It will be interesting to see if the footwork ends up influencing Klopp’s decision.