1. Chelsea (Barcelona 0-0 Chelsea in Champions League)
2. Osasuna (Barcelona 0-1 Osasuna in La Liga)
3. Hercules (Barcelona 0-2 Hercules in La Liga)
4.
5. Deportivo La Coruna (Barcelona 0-0 Deportivo in La Liga)
I have a feeling it was a cup game just because you realised you missed one and I would have found it surprising if you missed a league game or a Chelsea game I just have no idea who it could be. There's a million teams that could have come up against them in one round and found a 0-0 draw at Camp Nou.
Arsenal?
CLUE: The remaining three teams are all Spanish teams.
1. Chelsea (Barcelona 0-0 Chelsea in Champions League)
2. Osasuna (Barcelona 0-1 Osasuna in La Liga)
3. Hercules (Barcelona 0-2 Hercules in La Liga)
4. Athletic Bilbao (Barcelona 0-0 Athletic Bilbao in Copa Del Rey)
5. Deportivo La Coruna (Barcelona 0-0 Deportivo in La Liga)
Athletic Bilbao?