The Las Palmas midfielder believes referees have a duty to protect players from such chants.
Muntari walked off the pitch in protestation, after complaining to the referee that the home fans were directing racial chants at him.
The 32-year-old was rather booked for dissent, after the referee felt his complaints went overboard.
Muntari has subsequently received backing from certain quarters, notably the United Nations High Commissioner for Human Rights, Zeid Ra'ad al-Hussein, who described the Ghanaian as “inspiration”.
And now Kevin-Prince Boateng has also waded in, insisting referees owe it a duty to protect players from such abuses.
The Las Palmas midfielder knows all about racial chants, having being subjected to such abuse in his time at AC Milan.
Boateng told Sky Sport: "I'm sad and I understand Sulley Muntari. Everyone knows that he is a wonderful guy and a winner.
"If he left the field, it's because something happened, and I have to say it shook me a little bit.
"It's difficult to explain how I feel. I'm sad and angry because those who are around close their eyes.
"When it happened to me, I also talked to the referee because their duty is not just to be there and be whistling.
"The referee doesn't just have to leave the field and give a warning [to the fans]. The referee should have more authority."
This is not the first time, such instances are happening, as many black players have fallen victim to racial chants while playing the game.