Gustavo Heide

Gustavo Heide (born 28 February 2002) is a Brazilian tennis player.

Heide has a career high ATP singles ranking of 159 achieved on 10 June 2024. He also has a career high doubles ranking of 197 achieved on 2 October 2023.

Heide has won 1 singles ATP Challenger singles title at the 2024 Paraguay Open and 2 doubles titles at the 2021 Aberto da República and at the 2023 Florianópolis Challenger.

2023: First singles Challenger final, Top 250
He made it into his first singles Challenger final at the 2023 Open Bogotá but withdrew before the match handing the title to Thiago Agustin Tirante. Despite this, he reached the top 250 climbing more than 50 positions up in the rankings on 2 October 2023.

At the 2023 Pan American Games, Heide almost won a medal in singles, despite being only No. 252 in the world. He reached the semifinals, where he faced the tournament's top seed Facundo Díaz Acosta, ranked No. 109 in the world, and had match-point to close the game, but ended up losing in the tiebreak of the last set. In the bronze medal match, against compatriot Thiago Monteiro, he also lost in the last set tiebreak. In doubles, Heide, playing with Marcelo Demoliner, overcame the pro-Chilean crowd and took gold.

At the Montevideo Challenger, Heide reached the semifinals, losing again to Acosta.

For winning the IV Maria Esther Bueno Cup at the end of 2023, Heide earned an invitation to compete in the ATP 500 in Rio de Janeiro, in February 2024.

2024: ATP debut, maiden Challenger title, top 200 and Major debuts
He participated in the tie between Brazil and Sweden for the Davis Cup World Qualifier, in February 2024.

At the ATP 500 tournament in Rio de Janeiro, he made his ATP debut as a wildcard, where he faced Chilean Tomás Barrios Vera but lost in the first round.

In March, Heide reached the semifinals of the Challenger in Santiago and soon after, at the inaugural Challenger in Asunción, Paraguay, he reached the final, defeating world No. 95 and top seed Juan Pablo Varillas. He won the championship match, lifting his maiden title by defeating his compatriot João Fonseca and made his top 200 debut at world No. 159 on 10 June 2024, moving more than 50 positions up in the rankings.

Ranked No. 174 at the time, Heide qualified for his first Grand Slam at the 2024 French Open after defeating Lukáš Klein, Bu Yunchaokete, and Matteo Gigante in the qualifying competition.