Messi set the Camp Nou on fire with his second-minute goal, as he put his team 2-1 up on aggregate.
Ousman Dembele's initial pass was blocked after Messi attempted a one-two with him, but Luis Suarez picked the ball up and played his teammate in down the right side of the box with a neat pass.
The Argentine chased the pass, before hitting a fantastic first-touch shot in from a tight angle.
Thibaut Courtois watched as the ball rolled through his legs, putting the home side 1-0 up on the night in an early blow to Antonio Conte's side.
You can check out the goal here:
14 March 2018
And from another angle:
14 March 2018