Sunderland's Anderson: Leaving Aberdeen big gamble
He also said the Black Cats had to "face the music" after Saturday's 3-0 defeat. Anderson conceded their second penalty of the game after coming on for his debut.
"The manner of the defeat was disappointing so he (Keane) was obviously hacked off," he acknowledged. "If you don't play well, you are going to have to face the music. There were a few home truths said in the dressing room."