Belle, the wife of Chelsea star Thiago Silva, has slammed Chelsea fans for booing during the defeat to Manchester City.
Mahrez scored the winner to leave Chelsea in 10th place – and ten points off the top four.
Graham Potter’s side have won just once in eight games and frustrated supporters made their feelings known at the end of the game.
Belle questioned the fans’ support with a blunt statement on Twitter.
She wrote: “Don’t come to Stamford Bridge if you’re not singing. Come on Chelsea.”
The Brazilian also shared a video of some of the boos and gave a surprise reaction.
Belle then began singing “Come on Chelsea!” along with the people she was seated next to.
She clashed with Chelsea fans previously after questioning the lack of photos of Silva around Stamford Bridge.
Belle is often quick to defend her husband, and slammed a commentator who criticised the centre-back for not attacking enough in a match against Brentford last season.
She said: “I’m here in my box at Stamford Bridge. I just listened right now to the commentator, who said that Thiago Silva is not attacking enough.
“Respect Thiago Silva because Thiago Silva arrived yesterday, Thiago Silva played for Brazil, Thiago Silva is very tired, Thiago Silva is 37 years old, he plays like he is 20 years old.
“So respect him, he’s not a machine. He needs to relax, alright?”