Roger Federer has penned an emotional farewell letter to Rafael Nadal, as the Spanish legend competes in the final tournament of his career at the 2024 Davis Cup.

What happened?

Federer took to Instagram to express his gratitude and admiration for Nadal, reflecting on their decades-long rivalry and friendship.

Why it matters for Roger Federer

The letter highlights the significant impact Nadal has had on Federer's career, pushing him to work harder and innovate his game, particularly on clay courts.

Federer noted that Nadal's dominance on clay made him feel like he was "stepping into your backyard," and he had to work harder to keep up.

What comes next?

Nadal's singles match against Botic van de Zandschulp is underway, as Spain takes on the Netherlands in the Davis Cup quarterfinals on Tuesday.

Federer concluded his letter by congratulating Nadal's family and team, and expressing his support for his friend's future endeavors.

The two tennis legends have broken barriers in the sport, playing matches in front of record-breaking audiences and organizing charitable exhibitions around the world.

Federer and Nadal played their final match together at the Laver Cup in 2022, with Federer saying it "meant everything" to have Nadal by his side as his doubles partner.

Nadal's retirement marks the end of an era in tennis, and Federer's tribute is a testament to the enduring legacy of their rivalry and friendship.

Federer is five years older than Nadal, and he reflected on the Spaniard's emergence to the tennis world, saying "Twenty years later, Rafa, I have to say: What an incredible run you’ve had."

The 2024 Davis Cup quarterfinals will continue on Thursday, with the United States vs. Australia, and defending champion Italy vs. Argentina.

Federer's heartfelt letter has resonated with fans and players alike, celebrating the extraordinary career of Rafael Nadal and their unforgettable rivalry.

Nadal's superstitious tendencies, including assembling his water bottles and adjusting his underwear, were also fondly remembered by Federer, who said "Secretly, I kind of loved the whole thing."

The championship round of the 2024 Davis Cup will be held on Sunday, with the winner advancing to the next round.

Federer's tribute to Nadal is a reminder of the significant impact they have had on the sport of tennis, and their legacy will continue to inspire future generations of players.