Serena Williams's coach and rumored boyfriend Patrick Mouratoglou responded to one of her tweets on August 5, where he appears to be playfully flirting with her.

The American tennis star posted a picture of herself holding her dog Chip with the caption "I had to have a talk with my son Chip after one of my matches.... Look how well he listens."

Patrick Mouratoglou responded, saying "@serenawilliams Nice to find out that he is doing the match debriefing before I do it with you ! This dog knows how to get what he wants."

The tennis couple also made headlines for their relationship with Serena Williams' father, Richard Williams.

Richard Williams boycotted attending the Wimbledon 2013 tournament, where Serena Williams had an early dismissal, because he isn't happy she's dating Patrick Mouratoglou - the most likely cause of his discontent lies in the French coach's marital status, AOL Entertainment reports.

Patrick Mouratoglou is in a divorce case with ex-wife Clarisse Mouratoglou and is still dating Serena Williams.