Former Olympic and two-time world champion Rafaela Silva triumphed in the women's under-57 kilograms category, winning by ippon against Argentina's Brisa Gómez at the Centro de Deportes de Contacto.

It marked a first Pan American Games gold for the 31-year-old, who had initially won the tournament at Lima 2019 but was stripped of her medal after returning a positive doping test, with Ana Rosa of the Dominican Republic reallocated as the victor.

Rosa missed out on a bronze medal in Chile's capital to Panama's Kristine Jiménez.

Colombia's María Villalba earned the other bronze medal.

Larissa Pimenta defended her under-52kg title with her opponent Paulina Martínez of Mexico recording three shidos, with bronzes going to the United States' Angelica Delgado against Puerto Rico's Francine Echevarria and Panama's Lilian Cordones against Judith Gonzalez.

Alexia Nascimento completed a trio of Brazilian winners in the women's events, overcoming two-time Pan American Games medallist Edna Carrillo of Mexico by ippon at under-48kg.

Amerca;s Maria Laborde triumphed against Erika Andrea Lasso Arias of Colombia in the first bronze medal bout, followed by Amanda Lima of Brazil beating Pan American Championships winner Mary Dee Vargas, who had been the podium hopefuls for host Chile.

Michel Augusto prevailed against Colombia's Johan Rojas by ippon in the men's under-60kg final for a fourth Brazilian victory.

Arath Juárez doubled Mexico's podium presence by defeating Sebastián Sancho Chinchilla of Costa Rica for bronze, and Juan Pablo Ayala of Ecuador earned joint-third place by beating Chile's Lucas Eduardo Fernández Silva.

Both bronze medal bouts were settled by three shidos from the losers.

The other gold on the first day of judo at the Games went to Willis García of Venezuela, winner of the men's under-66kg final by ippon against Julien Frascadore of Canada.

Cuba's Orlando Polanco won the first bronze medal bout against Lenin Preciado of Ecuador, followed by Brazil's Willian Lima beating Juan Postigos of Peru.

Brazil additionally had a prosperous day in tennis, winning the men's and women's doubles gold medals at the Centro Deportivo de Tenis.

Gustavo Heide and Marcelo Demoliner went down to a thrilling tiebreak against Chileans Tomás Barrios and Alejandro Tabilo in the men's final after sharing the first two sets on Central Court.

The Brazilians took the first 6-1, only for their opponents to hit back 6-2.

The home crowd left disappointed after Heide and Demoliner took the tiebreak 10-7.

Nick Hardt and Roberto Cid of the Dominican Republic earned bronze by edging a close encounter against Costa Rica's Rodrigo Crespo and Jesse Flores 7-6, 4-6, 12-10.

Olympic bronze medallist Laura Pigossi and Luisa Stefani were more comfortable in the women's final, triumphing 7-5, 6-3 against Colombia's Fernanda Herazo and Paulina Pérez.

Argentina's María Lourdes Carlé and Julia Riera won both sets 6-3 against Chile's Alexa Guarachi and Fernanda Labraña in the bronze medal match.

Yuliana Lizarazo and Nicolás Barrientos of Colombia denied Brazil a clean sweep of golds, winning the mixed doubles final 6-3, 6-4 against Stefani and Demoliner.

Argentina's Martina Capurro and Facundo Díaz Acosta beat Peru's Conner Huertas del Pino and Romina Ccuno 6-1, 6-4 for bronze.

The US failed to win a gold medal today but remain top of the overall standings.

They have won a total of 61 gold medals, followed by Mexico on 35 and Canada on 32.

A good day for Brazil moved them up to 26 gold medals in fourth place.