Guardiola said goodbye to the Nou Camp crowd with victory over Espanyol last night.
During his talk on the pitch at the final whistle, Guardiola hinted at a possible return when he said "I'll see you later."
Barca president Sandro Rosell declared: "He left through the front door and he'll come back through the front door. When he wants. In these moments, I'm proud to be FC Barcelona's president."