By FOX Sports staff
Despite Barca having the better of the match at the Camp Nou, it was Sevilla who took the lead through Alberto Botia in the 42nd minute.
But two goals in eight minutes turned sealed the win for the Catalans as David Villa equalised in the 52nd minute before Messi scored his 38th league goal of the season on the hour mark.
The come-from-behind win comes just days after Barca's shock 2-0 defeat at the San Siro to AC Milan in the first leg of their UEFA Champions League last-16 tie.
"We can lose a match, but what's truly important is how we react," Roura said on the club's website.
"We just played a very difficult match ... we had the game under control but they scored. Once again, this team dug deep and fought it out to win a very important league game.
"The reaction was splendid."
Roura revealed he had simply told his players at half-time to remain calm and stay patient.
"I told them to be calm and I talked about varying our tactics," he said.
"We still had 45 minutes left and the game was wide open. The worst thing we could have done is rush things."
Saturday's 2-1 win over Sevilla extends Barca's lead atop La Liga to 15 points with second placed Atletico Madrid to play Espanyol on Sunday.