Atalanta, Milan managers condemn alleged actions of fans
MAY 11, 2014 12:48p ET
Milan's France-born Guinea international was seen showing a banana to officials at the Stadio Atleti Azzurri d'Italia towards the end of a game the visiting side went on to lose 2-1.
Villarreal were subsequently fined 12,000 Euros by the Spanish Football Federation.
After full-time in Bergamo on Sunday, Atalanta boss Stefano Colantuono said: "Whoever threw the banana on the pitch deserves to have a coconut thrown back at them.
"They've ruined what was a great afternoon."
His Milan counterpart Clarence Seedorf added: "I hope they find the culprit and do what they have to do.
"I can only compliment my players who continued to play and got on with their jobs."
Constant, 26, walked off the pitch in response to alleged racist chanting during a pre-season friendly against fellow Serie A side Sassuolo in July.
And in January 2013, Kevin Prince-Boateng - now with Schalke - threw the ball into the crowd and walked off the pitch after fans of lower-league Pro Patria hurled racist abuse at him during a friendly match in Busto Arsizio.
The match was subsequently abandoned and six Pro Patria fans were convicted of racial abuse and imprisoned.