New parent Serena Williams has thanked her own mother for being her role model.
In an open letter to her mother posted to Reddit, the tennis star called her mother Oracene Price "one of the strongest women I know".
Williams mentioned some of the criticisms she has endured about her muscular body, before telling Price she's proud that "we were able to show them what some women look like".
The 23-time grand slam singles title winner added: "We are curvy, strong, muscular, tall, small, just to name a few, and all the same: we are women and proud!"
Williams said she hopes to "have the same fortitude" in raising her own daughter, Alexis Olympia, who was born on September 1. She signed the letter: "Your youngest of five."
Williams is engaged to Reddit co-founder Alexis Ohanian.