The Barcelona star had to be substituted during his side's 1-0 friendly win over Honduras after a collision on Friday.

Messi is continuing to undergo treatment as he slowly recovers, with Argentina also saying he is comfortable with basic daily activities.

The 28-year-old's progress is a good sign for Gerardo Martino's men, who open their Copa campaign against Chile on June 6.

Messi and Co. will also face Panama and Bolivia in Group D as they look for a 15th continental title.