McGinn scored one goal and provided the assist for another in that remarkable game, with the Reds boss reportedly curious about whether the Scot ever stopped running.
His strengths in carrying the ball forwards and pressing high up the pitch have also piqued Klopp’s interest as he looks to revitalise Liverpool’s gengepressing style of play.
If they did explore a move for McGinn, Liverpool can take the advice of Ferguson, who was reportedly frustrated that Manchester United did not sign him.
“What I do know is that Sir Alex Ferguson is wondering why Manchester United let a talented Scottish boy slip through,” former Aston Villa scout Bobby Jenks told The Athletic.
“He’ll be keeping a close eye on him that’s for sure and if he continues the way he is, you can bet he’ll be telling his pals at United, too.”