The 21-year-old picked up a serious knock in the Blaugrana's 3-2 victory over Sevilla on Saturday, though Carles Puyol & Andres Iniesta will be fit for the Clasico
If the Spain international returns from injury in the predicted two-month timeframe then he could miss miss as many as 11 matches for the Blaugrana, including this coming weekend’s Clasico against Real Madrid on Sunday, October 7.
Thiago picked up the injury in Barca's 3-2 win against Sevilla on Saturday, when Tito Vilanova's side came back from two goals down to win in the third minute of stoppage time.
In more positive news for the Camp Nou club, Andres Iniesta, Carles Puyol and Adriano have been confirmed fit to face Los Blancos in the first La Liga Clasico of the campaign having trained with the first team on Sunday.
The two Spanish giants have already faced off twice this season, in which Jose Mourinho's men came out on top over two Spanish Supercopa legs.