Things seem to be in the pink for WTA No. 1 tennis superstar Serena Williams, as she currently has a series of Grand Slam titles under her belt, and an apparently healthy professional relationship with coach, Patrick Mouratoglou. However, rumors have begun to surface saying the two have developed a romantic bond.

Earlier this year, when Williams performed poorly with her sister in a doubles competition finals match, many believed it was because of strife in her love life. Allegedly, the 44-year-old French tennis coach hadn't seen Serena for two days, which apparently had somewhat of an affect on her.

Beyond that, the 32-year-old superstar athlete was also rumored to be allegedly pregnant following her sudden exit from the Wimbleon 2014 tournament roster. However, it was later revealed that she wasn't pregnant, she was only suffering from a viral illness. Since then, it's been reported that she's made a full recovery.

These days, Williams and Mouratoglou have been adding fuel to the rumors as they've become more open about their alleged romance. The pair has been spotted dining together in New York, at the popular high-end restaurant, Bagatelle. For those interested, the two ordered crab salad, truffled chicken, and oysters.

Reports are also keeping tabs on what the two are saying to each other over social media, which furthered the rumors about a relationship. Williams' has reportedly posted photos with Mouratoglou, including a fan favorite of one with her dog in it.

On the other hand, Mouratoglou has posted a picture of a Serena Williams' work out/training session, with a caption saying he was "simply very proud."

Currently, the allegedly tennis couple is in New York for the US Open 2014.