Lionel Messi has said he feels "fatigued and heavy, lacking rhythm" after returning from a calf injury that saw him miss the opening matches of Barcelona's 2019-20 campaign.
After the 2019 Copa America, Messi returned to Barca training in early August, but he was almost immediately sidelined.
He subsequently missed the club's pre-season tour to the United States, as well as La Liga games against Athletic Club, Real Betis, Osasuna and Valencia.
The Argentinian returned as a substitute against Borussia Dortmund in the UEFA Champions League last week, but he could not break the deadlock in a 0-0 draw.