David De Gea endured a nightmare as Manchester United suffered a 3-1 defeat to Chelsea in the FA Cup semi-final.
Ole Gunnar Solskjaer resisted playing usual FA Cup goalkeeper Sergio Romero for De Gea and it is a decision he would come to regret.
The Spaniard must a weak attempt to prevent Olivier Giroud's flick-on in the first-half stoppage time then failed to stop Mason Mount's pedestrian long-range strike just after half-time
The loss was all but sealed when captain Harry Maguire converted Marcos Alonso's cross into his own net after 74 minutes.
Bruno Fernandes grabbed a consolation penalty with five minutes remaining after Anthony Martial was fouled by Callum Hudson-Odoi.
Frank Lampard's Blues were in complete control from the first whistle to the last and will now take on Arsenal in the final at Wembley on August 1.
And speaking after the game, Ole Gunnar Solskjaer admitted De Gea was at fault for the two goals.
"Obviously everyone has to perform and everyone has a chance every game to stake a place in the team. David knows he should have saved the second goal but that's done now, we have to move on and look forward to Wednesday," Solskjaer said.
"It's hard for a keeper to make amends. So much easier for outfield players. David showed in the rest of the game, he made a few good saves, but he knows he could have saved that one."
