FILE - In this Sept. 29, 2019, file photo, silver medal winner Justin Gatlin, of the United States, smiles during the medal ceremony for the men's 100m event at the World Athletics Championships in Doha, Qatar. Gatlin and Jamaican Asafa Powell may be late 30-something sprinters but they feel as youthful as ever. There's no retirement talk even with the Tokyo Games delayed for a year due to the coronavirus. (AP Photo/Nariman El-Mofty, File)

FILE - In this Aug. 18, 2016, file photo, Jamaica's Asafa Powell smiles after the men's 4x100-meter relay at the 2016 Summer Olympics in Rio de Janeiro, Brazil. There's no retirement talk even with the Tokyo Games delayed for a year due to the coronavirus. Justin Gatlin will be 39 by the time the games roll around, and Powell is just nine months younger. They are both ancient in this young sprinter's game. (AP Photo/Matt Dunham, File)

FILE - In this July 9, 2019, file photo, Asafa Powell, from Jamaica, competes in the 100m event at an International Athletics Meeting in Lucerne, Switzerland. American Justin Gatlin and Jamaican Asafa Powell may be late 30-something sprinters but they feel as youthful as ever. They still think they can give the younger generation a run for their money. (Urs Flueeler/Keystone via AP, File)

FILE - In this Sept. 28, 2019, file photo, Justin Gatlin, of the United States, competes enroute to a silver medal in the 100m event at the World Athletics Championships in Doha, Qatar. Gatlin will be 39 by the time the games roll around, and Jamaican Asafa Powell is just nine months younger. They are both ancient in this young sprinter's game. They still think they can give the younger generation a run for their money. (AP Photo/Petr David Josek, File)