Serena+Williams*34-year-old tennis star Serena Williams has earned more than $74 million in her 20-year career, and won 36 major titles including 21 Grand Slams. She has overcome many obstacles to achieve her level of success but she says her greatest accomplishment has been learning the love her own body.

In a recent interview with the Saturday Times, the reigning tennis champ discusses her muscular frame and the hate she has received because of it.

“I know I get flack for my physique, and it has been a struggle to love my body, but now curves are in and I’m happier in myself,” she told the British publication.

She also explained that the criticism began when she was a little girl and that she struggled being around more petite sports stars.

“When I was younger, it was hard seeing all these thin athletes when I had more muscular curves and was big-busted,” she added. “Just try running with DDs that are bouncing seven inches up and down! It’s distracting, not to mention dangerous, because you can tear ligaments.”

Serena WilliamsIn related news, inflammation in the knee forced Serena to retire during the second set of her Hopman Cup match in Perth on Tuesday. She called it quits once she was down 7-5, 2-1 to Aussie Jarmila Wolfe.

“I just have some inflammation that’s been going away very slowly,” Williams said on Tuesday night. “It’s going away, but just needs a little more time. I was afraid to move, and I need to get in that space where I am not afraid and then I will be able to move better.”

Serena’s withdrawal comes two weeks before she’s due to defend her title at the Australian Open.

“I’ve been training really hard during the off-season. Really pushing myself beyond the limits. I just think a day off or two will make a world of difference,” she said, adding: “I only think positive and I know I’ll be okay.”