it was Venus, not Serena:
2017: (Reuters) - Tennis commentator Doug Adler has sued broadcaster ESPN, weeks after being taken off the air following a remark about Venus Williams at the Australian Open that some interpreted to be racist.
Adler, who has since apologized for how he spoke about Williams, has maintained that he was describing the African-American 13th seed’s aggressive style of charging as the “guerilla effect” and not comparing her to a “gorilla.”
https://www.reuters.com/article/us-tennis-espn-adler-idUSKBN15U04G
EVERONE knew what he said, but the race mongers needed an incident and ESPN caved.