Ignacio Buse

Buse was born in Lima to father Hans and mother Betty (née Acurio). His father is a tennis coach and former player. His paternal grandfather, Eduardo, and great-uncle, Enrique, were also tennis players, after whom Estadio Hermanos Buse in Lima was named. He is also the nephew of world-renowned chef Gaston Acurio.

Buse is of German descent through his great-grandfather. He began playing tennis at the Country Club de Villa in Lima. He later moved to Barcelona to train at the TEC Academy under Albert Costa.

2022: Juniors

Buse was a runner-up in the boys' doubles category at the 2022 French Open, with compatriot Gonzalo Bueno. He had good results on the ITF junior circuit, maintaining a 77-38 singles win-loss record and reached an ITF junior combined ranking of world No. 9 on 3 January 2022.

2023: First Challenger doubles final

In August, Buse reached his first Challenger doubles final in Lima partnering with Jorge Panta.

2024: First Challenger singles final, top 250

In February, Buse received a wildcard for the qualifying competition at the 2024 Chile Open. In August, he reached his first Challenger singles final in Como, losing to Gabriel Debru in the final.

2025: Major, ATP and Top 125 debuts

In February, Buse made his ATP Tour debut at the 2025 Chile Open, where he received a main draw wildcard, where he lost in the first round to eventual champion Laslo Djere.

In April, Buse reached the semifinals at the Aix Provence Open as a qualifier, with wins over second seed Luciano Darderi, his first top 50 win, and Reilly Opelka. As a result, Buse rose close to 40 positions up, reaching the top 175 in the singles rankings on 5 May 2025.

In June, Buse won his maiden Challenger title at the 2025 Neckarcup 2.0, defeating Guy den Ouden in the final. As a result he reached a career high singles ranking of world No. 152 on 9 June 2025. Buse entered his second ATP Tour tournament as a qualifier, at the Swiss Open and defeated fifth seed Laslo Djere, recording his first ATP win. He reached his first ATP Tour semifinal by defeating Kamil Majchrzak in the second round, and Román Andrés Burruchaga in the quarterfinals. As a result Buse reached a new career-high in the top 150 on 21 July 2025. He lost to Juan Manuel Cerúndolo in the semifinal.

In August, Buse made his Grand Slam debut as a qualifier at the US Open. He lost to sixth seed Ben Shelton in the first round. In September, Buse won his second Challenger title at the Copa Sevilla, defeating Genaro Olivieri in the final. At the 2025 Uruguay Open in Montevideo, Buse reached his third Challenger final of the season. As a result climbed to a career-high in the top 105 in the singles rankings on 17 November 2025.

2026: First ATP title, Masters debut & first wins, top 30

Buse reached the top 100 on 5 January 2026. Ranked No. 91 at the ATP 500 2026 Rio Open, Buse reached a semifinal at the ATP 500-level for the first time and only his second time at the tour-level, with wins over Brazilian Igor Marcondes, third seed and another local favorite João Fonseca and Matteo Berrettini.

In March, Buse made his Masters 1000 debut at the Miami Open as a qualifier, but lost in the first round to Damir Džumhur.

In May at the ATP 500 2026 Hamburg Open, as a qualifier, Buse reached again an ATP semifinal defeating fourth seed and defending champion Flavio Cobolli, Jakub Mensik and Ugo Humbert. He defeated lucky loser Aleksandar Kovacevic to reach his first ATP Tour final, becoming the fourth Peruvian singles finalist at an ATP event in the Open Era (since 1969), and the first Peruvian to reach this stage since Luis Horna at 2007 Viña del Mar. Buse defeated Tommy Paul in the final to become the first Peruvian titlist since Horna in 2007 and the first to win an ATP 500 title since Jaime Yzaga in 1993. He was the third qualifier to win an ATP 500 crown in series history (since 2009), after Nikoloz Basilashvili won Hamburg in 2018 and Daniil Medvedev in Tokyo that same year. As a result he reached the top 35 in the singles rankings, following the tournament, on 25 May 2026.

Buse is pursuing an online degree in business.

Singles

Current through the 2026 Winston-Salem Open.

Singles: 2 (2 titles)

Singles: 4 (2 titles, 2 runner-ups)

Doubles: 1 (runner-up)

Singles: 5 (3 titles, 2 runner-ups)

Doubles: 2 (1 title, 1 runner-up)

Doubles: 1 (runner-up)