After the end of the semi-final game against Panathinaikos, Giannis Bourousis had a heated argument with some fans of Panathinaikos. The fans of Panathinaikos didn't take this very lightly and decided to hack his Facebook account!
Hence in Bourousis' profile it was saying that he was sorry that he upset the fans of Panathinaikos, that they were the best fans on Earth and that he loves Panathinaikos. Later on he recovered his profile and put up another apology explaining what had happened. But the hackers didn't stop there and put up another message restoring the old message and saying "we're back, such is life giannis, g13. Action-reaction".
His profile in #Facebook while this is written features a photo of the players of Panathinaikos celebrating!