Serena Williams' coach and rumored boyfriend Patrick Mouratoglou snapped a photo of the Wimbledon star at a Women's Tennis Association event on Monday, captioning it "Lovely speech by @serenawilliams to round off WTA celebrations."

Patrick Mouratoglou also defended Serena Williams after his rumored girlfriend lost to Sabine Lisicki from Germany in the fourth round of Wimbledon on Monday, saying that she did her best.

"She's human," Mouratoglou told reporters after the 6-2, 1-6, 6-4 loss. "You cannot expect for anybody even if she is the greatest player of all time, if she is, to be perfect on all the matches all the year. She is not, and she will never be."

"I think still that her low level is better than it was before. But she is a human. She is going to lose some matches, and we have to be ready for that," he added.

But Serena Williams has also made headlines for her recent dispute with Russian tennis star Maria Sharapova, who dates her ex-boyfriend Grigor Dimitrov of Bulgaria.

The conflict began after Serena Williams made comments about Maria Sharapova during an interview with Rolling Stone magazine, where she called her "boring."

"There are people who live, breathe and dress tennis. I mean, seriously, give it a rest," Serena Williams said in a recent interview, indirectly referencing Maria Sharapova.

"She begins every interview with 'I'm so happy. I'm so lucky' - it's so boring. She's still not going to be invited to the cool parties. And, hey, if she wants to be with the guy with a black heart, go for it."

No word on whether Serena Williams and Maria Sharapova have made amends, but there are rumors they have.