French Open 2021: Roger Federer made to work in third-round win over Dominik Koepfer
The 3 1/2-hour epic forced Federer to dig deep.
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Roger Federer pulls out of French Open 2021 after win over Dominik Koepfer
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Brendan Bradford Sporting News Canada
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Adieu, Roger: Federer pulls out of French Open after Round 3 – WKRG News 5