Hundreds of athletes, including U.S. sprinter Justin Gatlin, participated in a test event at Tokyo's National Stadium on Sunday, as organizers fine-tuned operations and practiced COVID-19 countermeasures with under three months to go before the Summer Games begin.
No spectators were present in the stadium, where the Olympics opening and closing ceremonies will be held, as Tokyo remains under a state of emergency to tame a rise in coronavirus infections.
Sunday's event, involving 420 athletes, including nine from abroad, was split into morning and evening sessions with Gatlin on the start list for the 100-meter in the evening.