The Argentine forward has been nursing a hamstring injury and, despite taking a full part in Saturday and Sunday's training sessions, is yet to be declared fit by club doctors.
Tito Vilanova has named him in the squad for the trip to Germany to play Bayern Munich.
Javier Mascherano and Carles Puyol miss out through injury, whilst Adriano is suspended for the match.
Squad: Valdes, Pinto, Dani Alves, Pique, Fabregas, Xavi, Villa, Iniesta, Alexis, Messi, Thiago, Dos Santos, Bartra, Sergio, Pedro, Jordi Alba, Montoya, Abidal, Song, Tello, Oier
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- Sports & Recreation
- Carles Puyol