They argue that it is the reason for the Argentine's performance drop
It was assured in radio program 'El Partido de las 12' of Cadena Cope last night, after Barça's defeat on Atlético's ground, that Leo Messi has been playing for weeks with muscular problems. According to the station, this would be the main cause of the Blaugrana forward's performance drop. This injury of Messi, that went on several weeks, requires some rest that the agreement of the player with Barça and the Argentinian national team doesn't enable him to get, according to the source.
To back up their thesis, Cope went back on the visit Leo Messi paid to its dietician and trusted doctor, nutrition expert Giuliano Poser, and state that the travel to Italy was meant to monitor the problem and verify that the evolution of the injury is positive.
Reacting to the news, Barça denied to various media that Leo Messi has been playing whild injured, and they rely on the fact the player has been playing the last games entirely, with the Blaugranas as well as with Argentina.