Manchester United eased past Granada with a 2-0 victory, 4-0 on aggregate to reach the Europa League semi-finals.
Edinson Cavani gave United the lead in the sixth minute before Vallejo scored an own goal in the stoppage time.
It was a nightmare start for Granada and the visiting team conceded inside six minutes of play and United led by 3 goals on aggregate. Alex Telles' cross was flicked superbly by the advanced Paul Pogba onto the boot of Edinson Cavani and his well-placed volley found the bottom corner.
Five minutes to half time, there was a slight concern for United as German Sanchez rose to win the ball in the air from Cavani and the Uruguayan took a knock to the small of his back. Despite the knock, Cavani was okay to continue.
In the second half, United made it 2-0 and 4-0 on aggregate following Vallejo's own goal from Alex Telles cross that was targeting Juan Mata.
United will face AS Roma in the semi-finals of the Europa League.
Match stats here.