Serena Williams Boyfriend 2013: Patrick Mouratoglou Remains Coach Until Retirement? French Tennis Star Dishes Out In New York Times Interview

Serena Williams' coach and rumored boyfriend Patrick Mouratoglou revealed during a recent New York Times interview that she is perhaps one of the best tennis players he has coached, leaving many wondering if he'll stay with her until retirement.

"Serena will never drop her guard. She will stop perhaps, but she won't drop her guard. She won't be 50th in the world, that's for sure. She wouldn't accept it from herself. It's not the style of the maison," he told the New York Times.

"It can't hurt, that's for sure. For sure it helps. She told me all the trophies we win when we work together we'll put them in the academy. They are in the entry. We reorganized. We made a big room like a players' lounge in the entry with the bar and put a trophy case there, which is already full."

But Serena Williams posted ominous messages that appear to talk about her personal life on Twitter, leaving many wondering if she has dumped her coach Patrick Mouratoglou as a boyfriend.

"No it's not forever. It means until they or you are finished," the American tennis star wrote in a post.

"When it comes to relationships - forever could have a different meanings for sure - long list," responded one Twitter fan on her page.

Serena Williams might have given her coach and rumored boyfriend Patrick Mouratoglou a scare, but quickly avoided it - a fan on Twitter asked her if she would twerk if she wins the Australian Open and she quickly responded saying "Lol no way"

Other fans responded to the post also responded "Lmfao.. good answer!"

But Serena Williams appeared to be in pain during her last three matches at the China Open and had to take a medical timeout after complaining about back pains, leaving many fans wondering if her coach and rumored boyfriend Patrick Mouratoglou is wearing her out with all of the tournaments he is making her participate in.

"I've been a little tight all week. It's been a long year, so I was really happy," Serena Williams mentioned during a public interview following the final of the China Open.

Serena Williams has never used the on-court coaching rule which has been implemented on the tennis court for the last couple of years, TennisWorldUSA.org reports.

Her coach and rumored boyfriend Patrick Mouratoglou is usually in the stands to watch her matches but does not come down to the court for coaching in-between sets, TennisWorldUSA.org also reports.