Tennis legend Serena Williams announced her retirement in a Vogue article published Tuesday.

“I have never liked the word ‘retirement,‘” Williams wrote. “Maybe the best word to describe what I’m up to is ‘evolution.’ I’m here to tell you that I’m evolving away from tennis, toward other things that are important to me.”

Williams, who turns 41 next month, has 73 career singles titles, 23 career doubles titles and over $94 million in career winnings.

Williams is widely hailed as one of the greatest athletes of all time. In her Vogue piece, she noted that some of her detractors point out that she hasn’t won the most Grand Slam titles in women’s tennis history, however.

“There are people who say I’m not the GOAT because I didn’t pass Margaret Court’s record of 24 grand slam titles, which she achieved before the ‘open era’ that began in 1968,” Williams wrote. “I’d be lying if I said I didn’t want that record.”

She said she will retire after the U.S. Open, which will run from late August into September. A victory there would tie her with Court’s Grand Slam record.

“I don’t know if I will be ready to win New York. But I’m going to try,” Williams wrote about the tournament, which is played in Queens.

Williams focused on her family in the announcement, writing that her nearly five-year-old daughter wants to be an older sister. Williams is married to Reddit founder Alexis Ohanian.

“I have to focus on being a mom, my spiritual goals and finally discovering a different, but just exciting Serena. I’m gonna relish these next few weeks,” Williams wrote in an Instagram post Tuesday.

Professionally, she looks to expand Serena Ventures, a small investment firm of six people that was one of the first investors in MasterClass. Her firm raised $111 million in outside financing this year.