Watch: Barcelona closes in on miracle comeback after Messi's penalty

Barcelona's hopes of overturning a 4-0 deficit is one goal away from becoming reality after Lionel Messi's conversion from the penalty spot gave the hosts a 3-0 lead over Paris Saint-Germain at the Camp Nou on Wednesday.

The decision to award the penalty, however, was far from clear as the referee initially refused to point to the spot until the fourth official persuaded him to give the Blaugrana a a chance from 12 yards out.