Serena Williams needs to keep winning major tournaments to stay on top of her game, Bleacher Report posits, leaving fans wondering just how her coach and rumored boyfriend Patrick Mouratoglou will do so.

"She has won two majors each for the past two years, and it's important that she keeps up that pace if she wants to challenge Graf's 22," the website writes.

"Even though she is aging extremely gracefully, Serena's age will eventually catch up with her. It happens to everyone. Since Serena is already 32 years old, it's likely that she only has two or three more years at the top of the game."

Patrick Mouratoglou posted a video on YouTube highlighting "her incredible year."

The video, published on Monday, chronicled high and low points in Serena Williams' tennis career in 2013.

Earlier this week, it was reported that the American tennis star is a likely contender to win the United States Sports Academy "Athlete of the Year" award.

Serena Williams is one of the 12 finalists for the 2013 Female Athlete of the Year Award, according to AL.com.

Jamaican sprinter Usain Bolt is in the lead to win the Male Athlete of the Year Award.