New mum and tennis great Serena Williams has posted a heartfelt letter to her mother.
Williams shared the letter on Reddit, a website founded by her fiance Alexis Ohanian. The pair are celebrating the recent birth of daughter Alexis.
Williams, who has won 23 grand slam titles, writes about the difficulty of growing up as a muscular black woman and how her mother has been a role model throughout her life.
"Dear Mom,
You are one of the strongest women I know. I was looking at my daughter (OMG, yes, I have a daughter) and she has my arms and legs! My exact same strong, muscular, powerful, sensational arms and body. I don't know how I would react if she has to go through what I've gone through since I was a 15 year old and even to this day," the letter begins.
"I've been called man because I appeared outwardly strong. It has been said that that I use drugs (No, I have always had far too much integrity to behave dishonestly in order to gain an advantage). It has been said I don't belong in Women's sports -- that I belong in Men's -- because I look stronger than many other women do. (No, I just work hard and I was born with this badass body and proud of it).