The Catalans' bid to retain their Liga crown took a dent at Camp Nou on Saturday but the Argentine attacker is still happy to be fit again after a spell on the sidelines.
The Catalans have consistently held the top spot in Spain since the start of the season, but their loss at Camp Nou has given Atletico Madrid and Real Madrid a chance to leapfrog them Sunday.
The Argentine attacker was understandably disappointed with the result but says he is pleased to be back in action for Barca after spending around six weeks sidelined with a hamstring injury before the winter break.
"It was a bad day," Messi said Sunday.
Referring to his personal status, however, Messi added: "I'm happy because I've played several games in a row. Mentally, I am in very good place. It is true that some things went wrong for me fitness-wise but now everything is forgotten."