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3-time Grand Slam semifinalist Grigor Dimitrov is out of the US Open with an injured chest muscle

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Bulgaria's Grigor Dimitrov clutches his chest with an injury which forced him to retire injured from a fourth round men's singles match against Italy's Jannik Sinner at the Wimbledon Tennis Championships in London, Monday, July 7, 2025. (AP Photo/Kin Cheung)