![ATP Tour on Twitter: "🇬🇷 @StefTsitsipas advances after Reilly Opelka retires due to a right knee injury. He awaits the winner of Milos Raonic & Filip Krajinovic. #CInCyTENNIS https://t.co/s3TKT3wWuT" / Twitter ATP Tour on Twitter: "🇬🇷 @StefTsitsipas advances after Reilly Opelka retires due to a right knee injury. He awaits the winner of Milos Raonic & Filip Krajinovic. #CInCyTENNIS https://t.co/s3TKT3wWuT" / Twitter](https://pbs.twimg.com/media/EgYRnR-WoAczfac.jpg:large)
ATP Tour on Twitter: "🇬🇷 @StefTsitsipas advances after Reilly Opelka retires due to a right knee injury. He awaits the winner of Milos Raonic & Filip Krajinovic. #CInCyTENNIS https://t.co/s3TKT3wWuT" / Twitter
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Delray Beach Open 2020: Milos Raonic exits after semifinal loss to Reilly Opelka | Sporting News Canada
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