Liverpool has produced one of the greatest comebacks in Champions League football.
Trailing 3-0 after the first leg Liverpool scored four goals in the return game to win the tie 4-3.
Liverpool goals game from Divock Origi and Georginio Wijnaldum who each scored 2 goals.
The result was even more amazing considering that Liverpool was without two of its first-choice forward line, Mohamed Salah and Roberto Firmino.
The result means that Liverpool will either Ajax or Tottenham on 1 June.
For Barcelona, it was the second year in a row that it let a three-goal lead slip, having beaten Roma 4-1 at home in the quarterfinals in 2018 before losing the return leg 3-0 to go out.