Sebastián Báez

Career

Báez made his ATP debut at the 2021 Chile Open, where he lost to 2019 Junior French Open champion Holger Rune in straight sets. His first tour-level win came at the 2021 Hamburg European Open, where he defeated Corentin Moutet in the first round.

That year, he became the youngest player to claim five ATP Challenger Tour titles in a season, winning in Concepción, Santiago, Zagreb, Santiago-3, and Buenos Aires. He qualified for the 2021 Next Generation ATP Finals after Jenson Brooksby withdrew due to an abdominal injury, advancing to the semifinals with wins over Lorenzo Musetti and Hugo Gaston before losing to Carlos Alcaraz. By the end of 2021, he reached the top 100 at world No. 97 after winning his sixth Challenger in Campinas, Brazil.

In 2022, Báez entered the Melbourne Summer Set 1 as a lucky loser but lost in the first round to Emil Ruusuvuori. At the Sydney International, he qualified and defeated Christopher O'Connell before falling to Lorenzo Sonego in the second round. He earned his first Grand Slam win at the 2022 Australian Open by beating Albert Ramos Viñolas, then faced world No. 4 Stefanos Tsitsipas in the second round, losing in four sets. This result moved him into the top 80 at world No. 77.

He reached his first ATP quarterfinal at the 2022 Córdoba Open, defeating Fernando Verdasco and Cristian Garín. At the Argentina Open, he received a wildcard and beat Holger Rune before again losing to Lorenzo Sonego. At the Rio Open, he qualified with three-set wins over Nikola Milojević and Yannick Hanfmann but lost in the first round to Thiago Monteiro.