The award-winning film, for which Will Smith won an Oscar, King Richard, tells the story of Richard Williams and Venus and Serena Williams. The film explores the legendary sisters’ early beginnings and spotlights their father, Richard, and his unwavering commitment to his daughters’ futures. The Williams sisters are two of the most successful tennis players in the history of the sport. But the Williams sisters didn’t earn success without their fair share of obstacles. 

From humble beginnings—practicing on rundown and dilapidated courts—to facing ongoing criticism of their bodies and blatant acts of racism, the sisters have remained victorious both in their personal and professional lives. The struggles that Venus Williams and Serena Williams have faced over the years have been challenging, but the Williams sisters have unwavering courage that has kept them strong since they were kids. Their solid family ties and unshakable sisterhood always seem to be at the center of their strength and perseverance. Throughout their lifetime Venus and Serena Williams have been by each other’s side, cheering each other on.  

“Venus and I worked so hard. Still to this day we work side by side at practice…The motivation she gives me is second to nothing,” Serena said, per Sportskeeda.

 Here are 6 things you may not know about Venus and Serena Williams.