Serena Williams' coach and rumored boyfriend Patrick Mouratoglou posted a Facebook photo of the American tennis star in  a pink Nike tennis ensemble.

"Just before Serena's match during the warmup," Patrick Mouratoglou captioned the photo.

"Wow, isn't this lady Fashionista....?" a fan responded to the photo.

Earlier this week, the French tennis legend was featured in a 26minute documentary about his tennis academy.

"Watch the new 26 minutes documentary on MOURATOGLOU TENNIS ACADEMY about the Mauritius preparation wednesday at 2.45pm (1.45 pm in the uk), on Eurosport France and International (54 countries)," he posted on his Facebook account.

Serena Williams retweeted Miley Cyrus' post about listening to Brittney Spears' "Sometimes" love song, leaving many wondering if it could be related to her relationship with coach and rumored boyfriend Patrick Mouratoglou.

"One of my fav songs. When needed I repeat this too," Serena Williams wrote on Twitter.

"I wanna believe in everything that you say 'cause it sounds so good," one line of the song reads.

"But if you really want me move slow. There's things about me you just have to know."

Serena Williams released a photo of herself during a Berlei bra shoot, giving many the impression she may be releasing a new line.

"Behind the scenes of my new Berlei bra shoot #Berlei" she captioned the photo.

Her coach and rumored boyfriend Patrick Mouratoglou posted photos of her training at Melbourne Park for the Australian Open just after Serbian tennis star Jelena Jankovic mentioned she can "beat her."

"Last week preparation starts tomorrow to get ready for the #AustralianOpen main draw," he wrote in one post on Twitter."