Racism has again reared its ugly head in the Premier League and fans, viewers, players and officials have had enough.
Chelsea tightened their hold on a place in the top four with a 2-0 win at Tottenham but the match was marred by allegations of racist abuse.
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Willian's first-half double moved Chelsea four points clear of fifth-placed Sheffield United in the race for the final Champions League qualifying spot.
While Blues boss Frank Lampard will delight in taking the points against his old manager Jose Mourinho, both men have been left disappointed by the latest unsavoury incidents to rock the sport.
Unfortunately for the Premier League and football in general, racist behaviour has been all too frequent this season.
Earlier this month, more ugly scenes of racism overshadowed Manchester United's derby victory against Manchester City when a fan aimed monkey chants at United's Fred.
Tottenham finished with 10 men after Son Heung Min was shown a red card for kicking out at Chelsea's Antonio Rudiger, who was then the victim of the alleged racist incident.
Willian opened the scoring at Tottenham Hotspur Stadium by curling in a shot in the 12th minute.
The Brazilian then added his second from the penalty spot after a video review ruled Spurs goalkeeper Paulo Gazzaniga had clattered Marcos Alonso.
Things turned a ugly in the 62nd minute when Son petulantly kicked up at Rudiger from the ground after a challenge between the two.
Rudiger then gestured by imitating a monkey to indicate he had been abused by the crowd.
Blues keeper Kepa Arrizabalaga also had an object thrown at him from the stands.
Referee Anthony Taylor came over to speak to both managers and three announcements were made stating racist behaviour was interfering with the game.
"It is made very clear to us all that if we have heard any racist incident to report it," Chelsea captain Cesar Azpilicueta said.
"Tony came to me and told me he was listening to racist songs towards him so I reported it to the referee.
"We are very concerned and aware of this behaviour. Altogether we need to make it stop."
Manchester United legend and Sky Sports pundit Gary Neville led the outrage over the latest ugly racism to overshadow a Premier League fixture, with many calling for life bans to be handed to the culprits.
More English football racism today: Spurs fans racially abusing a black Chelsea player and throwing missiles on the pitch. Disgusting behaviour— Socialist Voice 🌐 (@SocialistVoice) December 22, 2019
Gary Neville is correct: We expect UEFA to deal with racism abroad, but what are English football clubs doing to about it at home?
It’s disgusting that racism, like it is around the world, remains such a problem across global football. Not what any of us want to be talking about after a great Chelsea performance but it’s a massive problem that needs to be continually called out. https://t.co/p5oMiWZl7Q— Adam Reckamp (@AdamReckamp) December 22, 2019
What an embarrassing moment. What an embarrassing day. Chelsea played better. And how did they react? Racism. So embarrassing. So very embarrassing. Can’t believe it ffs.— DayeF THFC (@daye_fubs) December 22, 2019
Anyone who threw things and/or abused chelsea players deserve more than a ban. Racism and abuse has no place in football or in general.— Scarlett (@thfcscarlett) December 22, 2019
Chelsea were the better team.... I can say all round... Hope the Premier League find a way to end the racism— YahwehHasRemembered🇳🇬 (@NwanbeE) December 22, 2019
What's this, racism in the Tottenham Chelsea game...— Salahmander 🇯🇵🇯🇵🇯🇵🇯🇵🇯🇵🇯🇵 (@nova_stine) December 22, 2019
4 times the announcement has come on.
We usually batter Chelsea fans for racist behavior but today we have to look inward as a club and find these people and ban them for life. I cannot have this at my club, absolutely gutted that I support the same club as these cretins. Banter is one thing but racism is not on.— Sammy Franklin (@Samm349) December 22, 2019
🗣 César Azpilicueta on the racism Antonio Rudiger suffered:— Absolute Chelsea (@AbsoluteChelsea) December 22, 2019
“He came to me and told me he heard some racism towards him. It's an issue not only in football but in life.”#TOTCHE pic.twitter.com/sua8rpUrqi
Tottenham coach Jose Mourinho said he didn't see the incident but that the referee followed proper protocol.
"He came to (fourth official) Andre Marriner, he came to me and Frank Lampard and told us what was happening," Mourinho said.
"Every club is together in this situation and of course we are disappointed."
‘Completely unacceptable and will not be tolerated’
Tottenham later said in a statement that they are "conducting a thorough investigation" into the allegations of racism.
"Any form of racism is completely unacceptable and will not be tolerated in our stadium," the statement added.
"We take any such allegations extremely seriously and shall take the strongest possible action against any individual found to be behaving in such a way, including stadium bans."
The win for Lampard and his team meant he got one over his former Chelsea coach Mourinho, whose Spurs side sit seventh.
Earlier, bottom side Watford, under new manager Nigel Pearson, scored twice in four minutes to shock Manchester United 2-0 in the day's other match.
Ismaila Sarr and Troy Deeney struck early in the second half at Vicarage Road as the Hornets picked up just their second league win.
United keeper David De Gea gifted Watford's 50th-minute opener when he somehow let Sarr's scuffed shot to go through his hands, hit off his head and post and fall into the net.
The visitors' generosity continued a short time later when Aaron Wan-Bissaka fouled Sarr in the area and Deeney drilled home the penalty.
Watford remain bottom on goal difference behind Norwich but move within six points from safety, while United stay eighth.