The pair played respective roles in the buildup to the first half goals scored by the Argentine forward.

Manchester United pair Ashley Young and David De Gea were subjected to heavy criticism on the internet in Tuesday's UEFA Champions League quarter final clash between Barcelona and Manchester Unted. The duo have been identified as the guilty parties for the brace scored by Lionel Messi in the opening 20 minutes of the encounter inside Camp Nou.

The agitation of fans initially surfaced after the Argentine forward capitalized on an error by Young to hand the hosts the lead in the 16th minute. The Englishman lost possession in his side's half and the Bluagrana No.10 pounced on the loose ball, tricked his way past two Manchester United players and sealed the move with a low and curling finish.

Four minutes later, Messi doubled his side's lead following an error on the part on the Red Devil's David De Gea. The Spanish shotstopper failed to stop a tame right-footer effort by the 30-year-old as the ball squirm right under him and crossed the goal line.

Below is how fans reacted to the roles played by both Young and De Gea in the build up to Barcelona's double in the first half: