Responding to former tennis player Ilie Nastase's recent remarks about about her unborn baby, Serena Williams said, "It disappoints me to know we live in a society where people like Ilie Nastase can make such racist comments".
She added, "I have said it once and I'll say it again, this world has come so far but yet we have so much further to go."
A pregnant Serena Williams reclaimed her top spot at the WTA world rankings, and took to social media to thank her unborn baby.
"My Dearest Baby, You gave me the strength I didn't know I had. You taught me the true meaning of serenity and peace," she wrote on Instagram.
"From the world's oldest number one to the world's youngest number one," Williams ended.
Rising Pune Supergiant ended Mumbai Indians' winning streak to win the 28th match of 2017 Indian Premier League by three runs.
Chasing 161, Mumbai's charge was led by skipper Rohit Sharma as he scored 58 runs. Opener Parthiv Patel scored 33.
For Pune, Jaydev Unadkat and Ben Stokes took two wickets each.
Mumbai lost this match after six consecutive victories.