Barcelona manager Gerardo Martino admits he is unsure whether Lionel Messi will recover from injury in time for the club's La Liga clash against Osasuna after the international break, reports ESPN.
The Argentina star stayed behind in Spain to continue working on his rehabilitation from the thigh problem that has ruled him out since the end of September, and will miss his country's World Cup qualifiers Peru and Uruguay.
Messi posted a photo on his official Instagram account on Monday, showing him undergoing tests with Barcelona doctor Ricard Pruna with the message: "Pasando revision/Doing my treatments to be ready soon #workhard #gettingfit."
However, despite the four-time FIFA Ballon d'Or winner's positive outlook, Martino has revealed that there are still some doubts over Messi's fitness for the Osasuna match on October 19.
He did have better news on fellow first-team absentees Jordi Alba and Javier Mascherano though, and intimated that all three players should be back in contention in time for the following weekend's El Clasico against Real Madrid at Camp Nou.
"I do not know if he [Messi] will be back for the game against Osasuna," Martino said. "From there, we can see about the next ones.
"But Jordi Alba and Mascherano will be there [at Osasuna]."