Chelsea eased past Manchester United 3-1 to set up an FA Cup final date with London rivals Arsenal.
United manager Ole Gunnar Solskjaer ditched his usual FA Cup keeper Sergio Romero to keep faith with David De Gea – but the experienced Spain international produced two horrendous errors either side of half-time to gift Chelsea two goals.
De Gea made a flimsy attempt to deal with Olivier Giroud’s flick in first-half stoppage time then weakly fumbled Mason Mount’s tame 20-yard shot into the net moments after the restart.
United’s nightmare was complete when captain Harry Maguire diverted Marcos Alonso’s cross into his own net at the near post with 16 minutes left.
Bruno Fernandes pulled a goal back from the penalty spot late on after Callum Hudson-Odoi fouled Anthony Martial but it was too little too late as the Blues closed out the win.