Manchester United were unable to secure a second successive second leg comeback in the Champions League.
Already trailing 1-0 from the quarter-final first leg, Barcelona outclassed them 3-0 at the Nou Camp to secure a 4-0 aggregate victory.
But Man United started well as Marcus Rashford struck the crossbar early on.
However, Barca talisman Lionel Messi took control of the tie. First he curled in from range on 16 minutes after finding space at the edge of the box.
De Gea Error
Four minutes later, he put Barca out of sight but David De Gea was culpable.
The Man United goalkeeper should have saved Messi's effort but the ball squirmed under his body and over the line.
Barcelona added a third in the second half as ex-Liverpool attacking midfielder Philippe Coutinho fired in.
April 16, 2019 - Torino, Torino, Italia - Foto LaPresse - Fabio Ferrari.16 Aprile 2019 Torino, Italia.Sport.Calcio.Juventus Fc vs Ajax - Uefa Champions League 2018 2019 - Quarti di finale - ritorno..Nella foto:Matthijs de Ligt (AFC Ajax)esulta dopo rete 1-2..Photo LaPresse - Fabio Ferrari.April 16, 2018 Turin, Italy.sport.soccer.Juventus Fc vs Ajax - Uefa Champions - quarter to final-.In the pic:Matthijs de Ligt (AFC Ajax)celebrates after gol 1-2 (Credit Image: © Fabio Ferrari/Lapresse via ZUMA Press)Barca now advance to a semi-final tie against the winner of Liverpool's tie with FC Porto.
In tonight's other quarter-final, Ajax caused another upset as they knocked Juventus out.
They had already eliminated Real Madrid in the last-16 and followed it up with a stunning win at Juventus Stadium.
Cristiano Ronaldo had given Juve a 28th minute lead. But Ajax were level six minutes later through Donny van de Beek.
And highly-rated young centre-back Matthijs de Ligt headed in the winner with 23 minutes to go.
It means Ajax advance to the Champions League semi-finals for the first time since 1996-97.
