Usain Bolt said his attempt at a three-peat at the Rio Olympics has him excited for his final Games.
The Jamaican sprinter took a haul of the 100m, 200m and 4x100m relay events in both Beijing and London, and is targeting gold in all three in Brazil in 2016.
Having already flagged his retirement in 2017, Bolt said he remains motivated to win all three events and cap a phenomenal Olympic career.
Bolt is in Brazil for the Mano a Mano sprint event, held at the Brazilian Jockey Club on Sunday.
"This is one of the main reasons why I'm so excited," Bolt told rio2016.com, regarding the defence of his gold medals.
"It would be a great achievement for me, so I need to take this season to ensure that my training is correct to get there next year. Everything has gone well so far and I am very happy.
"I have many races to go as I need. I started well, I've been feeling well; just need to prepare myself calmly."
Bolt is also targeting breaking his own records, with the 200m mark of 19.19 seconds he set in Berlin in 2009 - just days after his 100m record of 9.58secs - in his sights.
"The 200m [record] is certainly a must for me, so I'm really focused on fulfilling it," the 28-year-old said.
"It's the Olympic Games, it is the highest level, so the competition will be tough, but I'm very excited because the possibility of a record is always there."
Bolt and team-mates Nesta Carter, Michael Frater and Yohan Blake set the 4x100m world record in London, setting a mark of 36.84secs.