World Cup 2018: Fifa investigates 'homophobic chanting' by Mexico fans
Fifa is investigating alleged homophobic chants by Mexico fans during the 1-0 World Cup win over defending champions Germany on Sunday.
Sunday's chants seemed to be directed at Germany goalkeeper Manuel Neuer at the Luzhniki Stadium in Moscow.
The Mexican Football Federation (FMF) was fined nine times for supporters' homophobic chanting during the qualifying campaign.
It has repeatedly asked fans to refrain from using the slurs.
Javier Ruiz Galindo, head of the National House of Mexico for fans in Moscow, said the chant could be perceived in "many ways".
"It's not necessarily meant to insult somebody," he said. "We have been asked many times not to do it so we should be respectful," he told the BBC.
In November, the FMF won an appeal against two Fifa fines for the chant - which features the Spanish word for a male prostitute - but were warned "harsher sanctions" would be imposed if it was repeated.
Football's anti-discrimination organisation the Fare Network says the word "has a more general heterosexist connotation, and particularly in a football context is used as a pejorative and homophobic chant, referring to gay men and a derogatory way".
Every World Cup match has three anti-discrimination observers in the stands, monitoring the behaviour of fans.