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.

Federer needs 4 tight sets to reach French Open's 4th round – WKRG News 5

French Open: Roger Federer made to work in third round win over Dominik Koepfer

The Latest: Federer comes through tough test at French Open

French Open: Important I listen to my body – Roger Federer pulls out ahead of fourth-round

Adieu, Roger: Federer pulls out of French Open after Round 3 - The San Diego Union-Tribune

ARDUOUS: Roger Federer Pulls Through Dominik Koepfer in 3hours and 35 Minutes at French Open 2021 3rd Round - EssentiallySports

Nadal reaches third round at French Open, top-ranked Ash Barty withdraws

Djokovic, Nadal, Federer into French Open last 32 as Barty limps out - Sports - The Jakarta Post

ARDUOUS: Roger Federer Pulls Through Dominik Koepfer in 3hours and 35 Minutes at French Open 2021 3rd Round - EssentiallySports

Roger Federer pulls out of 2021 French Open after thrilling third-round win over Dominik Koepfer due to knee injury

French Open 2021: Roger Federer opponent's 'disgusting' act - Yahoo Sport