Milan Coach Massimiliano Allegri has expressed his disappointment after Ronaldinho was caught on camera at a nightclub in the early hours of the morning.
The 30-year-old had just returned from Doha where he had been making his international comeback for Brazil against Argentina.
Soon after stepping off the plane he told journalists of his intention to stay at Milan and fight for his place in the team after three matches in a row on the bench.
However, his late night antics have once again led to the questioning of his integrity.
"I have learned about it from you," Allegri told reporters. "No one has said anything about it to me.
"It certainly isn't alright. They are not hours that are compatible with the life of an athlete.
"It will be difficult to see Ronaldinho, Ibrahimovic and Robinho on the pitch simultaneously."