Roger Federer announced Sunday he's pulling out of the 2021 French Open. Federer cited his knee injury as the reason for his decision.

Here's his full statement:

Roger Federer defeated Dominik Koepfer in four sets on Saturday, but he said afterward he would have to see how his knee felt before deciding on whether or not he would continue at Roland Garros. Clearly, that knee wasn't feeling great, so Federer doesn't want to risk anything after two knee surgeries.

Federer was supposed to face Matteo Berrettini in the fourth round. Berrettini now automatically advances to the quarterfinals because of Federer's decision and will likely face top-seeded Novak Djokovic, unless there's a major upset pulled off by Lorenzo Musetti.

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The Swiss legend initially underwent right knee surgery in February 2020. In June, Federer announced he would need a follow-up surgery because of a setback. He finally made his return to the court in March 2021 at the Qatar Open.

Roger Federer is currently ranked No. 8 in the world. He remains tied with Rafael Nadal for the most major titles ever with 20. This was Federer's first major competition since the 2020 Australian Open.

We'll see when Federer is able to return to the court. He's 39 years old and doesn't have much to prove at this point, though he would surely love to own that record for most majors. Let's hope he heals up quickly and is able to return to action in the near future.

The next major is Wimbledon, which begins at the end of June.