Singapore's Joseph Schooling famously upset the great Michael Phelps to win Olympic gold but he said "my biggest rival is myself" as he bids to return to form at the Tokyo Games.
Schooling, the Southeast Asian city-state's first Olympic champion, said the year's pandemic delay had given him extra time to prepare after a disappointing world championships in 2019.
The 25-year-old caused a sensation at Rio 2016, when he beat his idol Phelps -- who has a record 23 Olympic gold medals -- by a fingertip to win the 100m butterfly.
Five years on, Schooling again looks an outsider and although he still wants to win "more than ever", he admitted much of his fate was beyond his control.
"It is always a never-ending pursuit of trying to get better. Win or lose, you're going to give it your best," he told AFP via email.
"In the past, I was always focused on winning, and I still am, I still want to win more than ever. But at the same time, it is also important to find a balance -- the push and pull, letting go of what you can and can't control."
- 'Had to make some changes' -
Schooling hasn't been at his best since Rio, and he crashed out in the heats of the 100m butterfly at the 2019 world championships in South Korea.
Later that year, he won only one individual title at the Southeast Asian Games in the Philippines, and was criticised by fans for being out of shape.
"I simply wasn't as prepared as I should have been for those two meets," Schooling said. "Having said that, I recognised that I had to make some changes which I did."
Schooling has been allowed to defer his compulsory national service -- set at two years for all Singaporean men -- since 2014, with an extension granted last year when the Tokyo Games were postponed.
"Despite the Tokyo Olympics being postponed, I think you can find positives out of every negative," he said.
"It gives me an extra year to get physically and mentally stronger, working on the things that can get me to where I want to be... I look at the extra year as a positive boost for myself."
Swimming against Phelps was a clear motivator for Schooling, who was photographed with the now-retired American legend as a boy.
Now, he said: "My biggest rival is myself. I want to perform at the best of my ability.
"You can't control what other people do, you can only control yourself and what you’re able to do," Schooling added.
"Right now my aspirations would just be to put myself in the best position possible to do the things I want, and win or lose, I'll be happy if I give it my all."
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