Six-time gold medalist Usain Bolt of Jamaica said the Rio Olympics will be his final Summer Games.
The 29-year-old Bolt, the only man to win the 100 meters and 200 meters in back-to-back Olympics, said "it'll definitely be my last Olympics."
"It's going to be hard to go four more years for me, to keep the motivation that I want, especially if I accomplish what I want to in Rio," Bolt said, according to French news agency AFP.
Bolt previously said he plans to compete at the 2017 world championships in London and retire after that. He acknowledged to The Daily Mail in 2015 that his sponsorship commitments have forced him to continue sprinting until next year, saying "my sponsor has asked me to go on for another year, to 2017 and London."
The Jamaican sprint star first established himself as the world's fastest man at the Beijing Olympics, where he set world records and won gold in the 100, 200 and 400-meter relay. He followed his Beijing triple haul by defending his three Olympic gold medals at the London Olympics in 2012.
Bolt has said he wants to separate himself from history even more by winning Olympic gold in the 100 and 200 three times in a row. Also, he still wants to break 19 seconds in the 200.
"My biggest dream at the Olympics is to win three gold medals again," Bolt said Monday. "That's my focus, that's what I want, and that's what I'm aiming for because that's my goal and that's my dream."
Bolt's main competitor in Rio this year will be Justin Gatlin, a 34-year-old American who won the 100-meter gold medal at the 2004 Athens Olympics and has twice been banned for doping.
To prep for Rio, Bolt said he will participate in the Diamond League's Anniversary Games meet in London on July 22. He didn't specify which races he'd run.