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TOPSHOT - Thirty-one-year-old eight-time Olympic champion Usain Bolt (L) trains for the first time for the A-League football club Central Coast Mariners in Gosford on August 21, 2018. (Photo by PETER LORIMER / AFP) / --IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE-- (Photo credit should read PETER LORIMER/AFP/Getty Images)

TOPSHOT - Thirty-one-year-old eight-time Olympic champion Usain Bolt (L) trains for the first time for the A-League football club Central Coast Mariners in Gosford on August 21, 2018. (Photo by PETER LORIMER / AFP) / --IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE--        (Photo credit should read PETER LORIMER/AFP/Getty Images)