Serena Williams loses to 19-year-old Emma Raducanu in Cincinnati

Twenty three-time singles' Grand Slam champion Serena Williams lost in straight sets to 19-year-old Emma Raducanu in her final WTA tournament at the Cincinnati Open. Raducanu won the game 6-4, 6-0 to move to the second round. "I can't believe I just played Serena...She's just such a legend," said Raducanu after the game.