Messi converted from the spot to double Barca's lead after Carvajal was sent off

Lionel Messi played in Luis Suarez and when his first effort was saved, a scramble ensued.

Barca desperately tried to force the ball over the line and whilst they eventually managed to do so, the whistle had already gone for handball.

The referee pointed to the spot and Carvajal was swiftly given his marching orders.

Messi stepped up and pewered the penalty beyond Keylor Navas to double Barca's lead and set them on course for victory.

Check out the strike for yourself below:

La desesperación de Carvajal. #RealMadrid #Barcelona pic.twitter.com/GGldZydXHt

— SotGol (@StevenSotoM8) 23 December 2017

GOOOOOOOOOLLLLL DEL D10S DEL FÚTBOL GOL DE LEO MESSI!!!!!! 0-2#ElClásico #LaLiga #ForçaBarça pic.twitter.com/ViqBZrc8xa

— Ronald Morales (FCB) (@RonaldFCB_Video) 23 December 2017