Manchester City suffered their first defeat of the 2018/19 Premier League season on Saturday at the hands of Chelsea at Stamford Bridge.
Goals from N'Golo Kante and David Luiz sealed a 2-0 victory for Chelsea to end City's unbeaten run and allow Liverpool to stay top after their win at Bournemouth.
The shock result wasn't the biggest story to come from west London, though.
Raheem Sterling allegedly had racial abuse shouted at him by a Chelsea fan during the game and footage posted by Ian Wright highlighted the verbal attack.
In the video below you can quite clearly make out what the Chelsea fan shouted at Sterling.
Investigations are now underway by Chelsea and the Metropolitan police, who will both review the footage after releasing the following statements.
"We're aware of reports and video footage," a Chelsea spokesman said. "We will investigate the matter and take the strongest possible action where necessary."
And the Met Police said: "We are aware of a video circulating online in which it is claimed racial abuse was allegedly directed at a player at a Chelsea v Manchester City game at Stamford Bridge on Saturday, December 8."
Sterling did extremely well to not react to the Chelsea fan's vile abuse and now the Englishman has responded with a passionate Instagram post.
In the post below, Sterling explains that he expected no better from the Chelsea fan because of the way black footballers are treated and represented in some sections of the media.
He wrote: "Good morning I just want to say, I am not normally the person to talk a lot but when I think I need my point to [be] heard I will speak up.
"Regarding what was said at the Chelsea game as you can see by my reaction I just had to laugh because I don't expect no better.
"For example you have two young players starting out [their] careers both play for the same team, both have done the right thing.
"Which is buy a new house for [their] mothers who have put in a lot of time and love into helping them get where they are, but look how the newspapers get [their] message across for the young black player and then for the young white [player].
"I think this [is] unacceptable both innocent have not done a thing wrong but just by the way it has been worded. This young black kid looked at in a bad light.
"Which helps fuel racism an aggressive behaviour, so for all the newspapers that don't understand why people are racist in this day and age all I have to say is have a second thought about fair publicity [and] give all players an equal chance."
Well said, Raheem. Sterling deserves huge respect for having the bravery to speak out and hopefully his post will help fix the ongoing issue of racism of football.