Billie Jean King, Wayne Gretzky and more describe Serena' Williams' greatness

Billie Jean King, Wayne Gretzky and more describe Serena' Williams' greatness

As three-time champion Serena Williams plays her final National Bank Open presented by Rogers, legendary sports stars Billie Jean King and Wayne Gretzky celebrate the tennis icon with words of praise. Plus current players Bianca Andreescu, Emma Raducanu, Coco Gauff and more weigh in on the legacy of Serena.