Pictures: A year of shame - Racism in football

Porto's Mali international striker Moussa Marega walked off the pitch in disgust after being subjected to a torrent of monkey chants in a stormy Portuguese league game at Vitoria Guimaeres on Sunday. The 28-year-old had scored a 60th-minute winner for Porto against his former club which sparked the home fans to aim even more vitriol at the France-born player. In the 71st minute, Marega signalled to the bench that he was walking off in protest even though teammates, Porto coach Sergio Conceicao and Vitoria players tried to get him to stay on the pitch. As he walked off, an angry and upset Marega gave a thumbs-down signal with both gloved hands to the home fans. It is the latest in a long line of racist incidents in thew past 12 months

On January 27 2019, racist chants during Millwall’s FA Cup win over Everton led to police intervention and Millwall opening an investigation and banning fans

Chelsea made a formal complaint to Uefa over racist chanting at Callum Hudson-Odoi during a Europa League game against Dynamo Kiev in March

England’s Raheem Sterling and Danny Rose were abused during a Euro 2020 match against Montenegro in March

Juventus' Moise Kean racially abused by Cagliari fans during Serie A match in April

In April, Tottenham Hotspur's England defender Danny Rose says he wants career to end so he can get away from racial abuse

April 8: Watford's Troy Deeney opens up about the abuse he receives on social media

Chelsea fans caught on video singing racist song at a Europa League game in Prague. Three players are prevented from entering stadium

Racism spreads to France in April as Ligue 1 game between Amiens and Dijon is suspended for several minutes after abuse is aimed at Prince Gouano

MK Dons forward Chuks Aneke is abused during match against Tranmere on April 15

April 17: Manchester United’s Ashley Young receives racial abuse on Twitter after Champions League exit to Barcelona

Many major players take to a social media boycott on April 18 to take a stand against racism

At the start of the new season in August, Chelsea’s Tammy Abraham is targeted online after missing a penalty against Liverpool in the Super Cup final

Reading’s Yakou Meite is abused on August 18 for missing a penalty for his side

The very next day, Manchester United's Paul Pogba gets verbal abuse after he misses a penalty

Inter Milan’s Romelu Lukaku is subjected to racial chants against Cagliari on September 2

England’s Euro 2020 qualifier against Bulgaria is halted twice due to racist chants from the stands

Sweden striker Alexander Isak is subjected to racist abuse by Romania fans in November

Italian daily newspaper Corriere Dello Sport comes in for criticism for its ‘Black Friday’ headline alongside images of Inter Milan’s Lukaku and Roma’s Chris Smalling

Serie A's no To Racism campaign backfires in a major way as it uses pictures of monkeys in its material in December

Porto's Moussa Marega gives fans the thumbs down as he walks off on Sunday