Serena Williams Boyfriend 2013: Patrick Mouratoglou Dumped? American Tennis Star Uses Hashtag ‘#solo4life’ After Discussing How She Enjoys Time Alone

Serena Williams used the hashtag "#solo4life" in a recent Twitter post where she described a day spent to herself, leaving many fans wondering if she has ended her romantic relationship with rumored boyfriend and coach Patrick Mouratoglou.

"I have been having some quality time with myself today," she wrote in her post.

"Movies with myself and driving around with myself. I think I like me."

Despite the ominous message, the duo is leading in a poll released by TennisReporters.net asking fans who they believe is the best women's coach of the year with 53 percent of the votes.

The questionnaire was published by the website as the "2013 TR Annual Readers Poll."

Coach Carlos Rodriguez and Li Na came second to Patrick Mouratoglou and Serena Williams, earning just over 22 percent of the votes.

Last week, she mentioned on Twitter that she is obsessed with jewelry chain Zales, leaving many fans wondering if she was giving her coach and rumored boyfriend Patrick Mouratoglou hints at a possible engagement.

Her tennis rival, Maria Sharapova, revealed during a recent interview that she only has respect for Serena Williams on the court, USA Today reports.

"On the court, I have the utmost respect for her; I really do," Maria Sharapova said about Serena Williams during a New York Times interview.

When asked if she also has respect for her off the court, she replied "it's different."

"I don't know what it is, but it's different, and to me, even though that tennis is such a huge part of our lives, at the end it's such a small part of our lives, and I value so many other more important things in life than just the sport."