Ronaldo Martínez

Martínez is a product of the youth academy of the Paraguayan club Cerro Porteño and began his senior career with them in 2015. He began his senior career on loan with Deportivo Capiatá in 2018. In 2019, he went on loan to the Torneo Federal A club Central Norte. On 19 April 2022, he moved to the Bolivian Primera División club The Strongest. On 5 January 2023, Martínez transferred to the Argentine Primera División club Platense on a 1-year contract. On 18 December 2023, he extended his contract with Platense until December 2026. He was an important part of the squad that won the 2025 Apertura, the club's first official title in more than 120 years.

Martínez played for the Paraguay U17s at the 2013 South American U-17 Championship. He was first called up to the Paraguay national team for a set of 2026 FIFA World Cup qualification matches in September 2025.

International

As of match played 10 October 2025

Martínez is named after the Brazilian footballer Ronaldo, and his middle name Iván comes from the Chilean footballer Iván Zamorano.