The King of Clay has possibly made his final farewell as a pro.

Rafael Nadal played in what could be his final match on Tuesday, falling in straight sets 6-4, 6-4 to Botic van de Zandschulp in the first singles match of the Davis Cup, to cap an extensive career that included 22 Grand Slams.

Though a victory from Nadal’s teammate Carlos Alcaraz kept their squad alive, even if Spain also wins the doubles match to advance, Nadal said after his defeat he would not select himself to play in the semifinal round. Such a decision would be left to Spanish captain David Ferrer, if needed.

Legends from the tennis world were quick to speak up and pay their respects to Nadal’s potential last hurrah. Led by Roger Federer and Serena Williams, here are the top reactions from across the sporting world:

Vamos, @RafaelNadal!

As you get ready to graduate from tennis, I’ve got a few things to share before I maybe get emotional.

Let’s start with the obvious: you beat me-a lot. More than I managed to beat you. You challenged me in ways no one else could. On clay, it felt like I…

— Roger Federer (@rogerfederer) November 19, 2024

Why am I getting so choked up. With @RafaelNadal retirement. I’m not good at goodbyes

— Serena Williams (@serenawilliams) November 19, 2024

Thank you for giving everything, @RafaelNadal. pic.twitter.com/Cvye6Lpt20

— Nike (@Nike) November 19, 2024