A mistake from Manchester City's goalkeeper Zack Steffen
Steffen took an extra touch after receiving a back pass from defender John Stones,
Ibrahima Konate scored Liverpool's opener, and Mane added his second just before half-time
with Jack Grealish and Bernardo Silva on the scoreboard for Man City.
Liverpool opened the scoring on the ninth minute
Their lead doubled just 10 minutes later when Mane chased down Stones' pass to Steffen,
Just before half-time, Mane found his second after picking up a clever pass
from Thiago Alcantara and volleying it past Steffen.
After the break, City replied quickly with Jack Grealish pouncing on a square ball from Gabriel Jesus
The goal gave City momentum, and the side went close two more times through Jesus.