Usain Bolt was asked whether he could beat Cristiano Ronaldo in a race, just three years after retiring from the running game.
Bolt, who still holds the world record for the 100 and 200 metre distances respectively, announced his retirement after the 2017 World Championships in London.
After injuring his hamstring injury towards the end of the 4x100m relay, he said: "It's really sad that I have to walk away now. I was saying goodbye to the fans and saying goodbye to my events also."
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Bolt would attempt to forge a career in professional football, and trained with Bundesliga giants Borussia Dortmund before joining A-League side Central Coast Mariners for an "indefinite training period" in 2018.
But after failing to agree a contract with the Australian side, he hung up his boots.
Two years on, eight-time gold medalist Bolt was speaking about his career in football when he was asked about Cristiano Ronaldo and whether he could beat the five-time Ballon d'Or winner in a race.
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He said: "For me, he works out every day. He's a super athlete, you know what I mean? He's always on top of his game. He works hard, he's focused. So right now, I definitely think he's faster than me."
Back in 2009, when he still playing at Manchester United, Ronaldo was handed some advice by Bolt in regards to his running technique.
"I explained to him a few things about when he is running and reaches top speed he starts to tip over... he always does that," Bolt said.
"I let him know if he brings his foot on the centre of gravity, or even in front of him, it will be much easier. He will be much better and he will go faster for longer."
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Bolt added: "Because he [Ronaldo] is so fast they keep pushing him around. I told him to be more rough on the guys and then they will leave him alone."
Ronaldo, who is six months older than Bolt, is currently playing for Saudi Pro League side Al Nassr. Bolt, meanwhile, is enjoying after recently admitting he turned down offers from the NFL.
Topics: Usain Bolt, Cristiano Ronaldo, Saudi Arabia, Saudi Pro League