Serena Williams is fresh off of a US Open victory and is turning 32 on September 26, leaving fans wondering if she'll celebrate her special day with coach and rumored boyfriend Patrick Mouratoglou.

The American tennis star recently dished out about her relationship with Patrick Mouratoglou during an interview with CBS News, hinting that she might not be too serious with him.

"You don't mix business and pleasure. I'm a firm believer in not mixing business and pleasure," she mentioned during her interview.

But Serena Williams mentioned in an interview with USA Today in June that she shares "something special" with her coach and rumored boyfriend Patrick Mouratoglou.

While Patrick Mouratoglou is currently in a divorce case with his ex-wife Clarisse Mouratoglou, he is rumored to be dating Serena Williams very seriously and has been noted for improving her tennis career. Serena Williams recently won her fifth US Open title and had a stellar performance at the French Open earlier this summer.

Earlier this month, Patrick Mouratoglou touted her performance in the US Open 2013, saying "#serena broke 100 victories with tonight's win since we work together."

But the coach and rumored boyfriend says that history or records are never discussed, according to the New York Daily News.

"She doesn't speak about it," Mouratoglou said. "What she says is she wants to be the best she can be. She wants to keep on improving. She said to me at the start, 'I'm prepared to do anything to be back to the top and to be winning Grand Slams.'"