Usain Bolt has confirmed the Rio Olympics will be his last.
The 29-year-old Jamaican sprint champion, who has won six gold medals in 100-metre, 200-metre and relays in the past two Olympics, says he doesn't have the desire to compete at Tokyo in 2020.
"It'll definitely be my last Olympics," Bolt told German news agency SID.
"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 also said he aimed to break the 19-second barrier in the 200-metres before his retirement in the next four years, while he plans to claim another treble in Rio.
"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."