The Argentine attacker missed the friendly match versus Hamburg due to a calf problem, but has returned to the training pitch for a light exercise workout
The Argentina international picked up a calf injury earlier this week, and consequently missed the Blaugrana's 2-1 friendly win over Hamburg on Tuesday.
The 25-year-old appears to have shrugged off the knock, however, as he returned to the training ground on Wednesday evening.
Messi did not feature in the regular practice session, but the prolific attacker completed light exercises apart from the group without any noteworthy problems.
Barcelona take on Raja Club Ath. in a friendly in Tanger on Saturday, and the Catalans will hope that Messi will be fully recovered in time to take part in the game as his absence will cost them €1 million.
Meanwhile, veteran defender Carles Puyol, who started training with the team on Monday after completing rehabilitation from knee surgery which ruled him out of Euro 2012, also trained apart from the group.