Anthony Joshua and Riyad Mahrez's wife Rita were seen flirting in a VIP section of a club, reports claim.
According to The Sun, Rita was reportedly seen with her hand relaxed on the undisputed heavyweight champion's knees at London club Tape on Friday, December 20.
It is understood that the model and singer was also spotted flirting with WBC champion Deontay Wilder last month.
Reports claim that the Manchester City winger and Rita have agreed to split and are living 200 miles apart.
A source told the publication: "Rita bumped into AJ on her way out and he invited her to join him at his table in VIP.
"Rita, who was with a female pal, clearly thought AJ was incredibly hot. They then spent much of the evening laughing and flirting."
However Joshua reportedly did not realize the lady he was chatting with was the wife of Algerian star, and quickly backed off after being told.
"He didn't have a clue who she was. He simply thought she was a pretty girl and enjoyed their chat.
"But when the club owner pointed out she was Riyad's wife, AJ got a bit awkward, and totally backed away.
"He explained he didn't want to step on any toes or cause a scene, and that he'd be stupid to be seen doing anything in public. They left with friends at 3am, but got into separate cars."
A spokesman for Joshua said: "He is disappointed his name is used to generate publicity in this manner".
Mahrez who is a devoted Muslim and non-drinker was said to be devastated after Wilder was accused of flirting with his estranged wife at Manchester hotspot Club Liv.
Representatives of Mahrez and Rita have been contacted for comment regarding the development.