Serena Williams' daughter might only be 1 year old, but she's already made the tennis star a grandmother ... sort of Maria Pasquini is the senior news editor for the human interest vertical at PEOPLE.

Qai Qai, for the uninitiated, is Olympia's daughter, and Serena's granddaughter. Qai Qai is famous because Olympia, still a baby herself, is notoriously bad at taking care of her. In the video ...

Meet Qai Qai, a doll with a bold personality and a lot of injuries thanks to her mom (Olympia) forgetting her all over the house, and the world. "I wanted her to have a black doll,” Serena ...