Former Manchester United striker Romelu Lukaku says 'we are going backwards' on racist abuse.
His statement comes after suffering racial abuse whilst playing for Inter Milan against Cagliari on Sunday.
After scoring a penality, Lukaku stared at the Cagliari fans behind making the goal who were shouting monkey chants.
The abuse follows other recent incidents of racism in the game, including abuse directed at Paul Pogba, Marcus Rashford and Tammy Abraham on social media.
"As players we need to unify and make a statement on this matter," Lukaku said.
"Many players in the last month have suffered from racial abuse… I did yesterday too," Lukaku in his statement.
"Football is a game to be enjoyed and we shouldn't accept any form of discrimination that will put our game in shame.
"Ladies and gentlemen it's 2019 - instead of going forwards we're going backwards.
"I hope the football federations all over the world react strongly on all cases of discrimination.
"Social media platforms (Instagram, Twitter, Facebook) need to work better as well with football clubs because every day you see at least a racist comment under a post of a person of colour. We've been saying it for years and still no action."
Cagliari said they were committed to "annihilating one of the worst plagues that affects football and our world".
In the past three seasons there have been other incidents of similar abuse at Cagliari, including last season Everton's Moise Kean was targeted when playing against Cagliari for Juventus.