Ignacio Buse def. Joao Fonseca — Round of 16, Rio Open 2026

🇵🇪ATP No. 96ranked ATP number 96 going into this drawWon

Ignacio Buse 5 6 6

🇧🇷ATP No. 33ranked ATP number 33 going into this draw

Joao Fonseca seeded 3(3) 7 3 4