The Barcelona star missed the second leg of their humiliating UEFA Champions League semi-final defeat to Bayern Munich after sustaining the problem in the quarter-finals against Paris Saint-Germain.

Messi, though, was able to return to help Barca equal Real Madrid's La Liga points record as they secured their 22nd Spanish title.

The Argentina international featured in Barcelona's 2-0 friendly defeat to Bayern on Wednesday and is confident that his injury worries are behind him.

"Luckily, my injury is a thing of the past. I’ve completely recovered. I’m very eager to start the season," he told the club's official website.

Barcelona's preparations for the new season have been disrupted by the departure of Tito Vilanova, who stepped down last Friday after it was revealed that he needed further treatment to help aid his recovery from cancer.

Vilanova has since been replaced by former Newell's Old Boys manager Gerardo Martino. Messi is hopeful that the strength of the squad will ease Barca through the transition.

"We're very sorry for what has happened but the team is strong. We have to keep on moving forward," he added.