Spanish tennis player Garbinje Muguruza announced the end of her career, after not playing for more than a year.
"It's time to say goodbye. It's been a long and successful career, but I feel it's time to retire," Mugurusa, 30, said.
She was the first female tennis player in the world and won two Grand Slam titles - in 2016 at Roland Garros and a year later at Wimbledon with victories over Serena and Venus Williams.
She is the only player in history who has reached major trophies by defeating both Williams sisters.
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