Overview

• The 35 km race walk opens the meet Saturday at 7:30 a.m. local time after schedule adjustments for heat and humidity.
• Mexico fields six racewalkers in the opener — Alegna González, Valeria Ortuño, Ximena Serrano, José Luis Doctor, Andrés Olivas and Julio César Salazar — and González will also contest the 20 km.
• Spain travels with a 56-athlete squad, including 35 km entrants Miguel Ángel López and Manu Bermúdez, following heat-acclimation work in Torrejón’s chamber and camps in Sierra Nevada and Font Romeu.
• World Athletics’ Sept. 1 requirement for chromosomal testing of female-category entrants is in effect, a policy criticized by athletes such as Malaika Mihambo.
• Global stars including Armand Duplantis, Yulimar Rojas and Noah Lyles headline the fields as competition runs through Sept. 21 in Tokyo.