NICK KYRGIOS weighed in on some of the world's biggest conspiracy theories.
And he boldly claimed it is "insanity" to believe humans built the pyramids.
Tennis ace Kyrgios, 29, appeared on Louis Theroux's podcast.
And the fascinating pair delved into some of the most important topics - including the pyramids, whether the earth is flat and the moon landing.
Asked if he thought humans built the pyramids, Kyrgios replied: "No, I don't. Impossible. Do you?"
Theroux said: "Definitely. I just think they rolled huge blocks around on logs."
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But former world No13 Kyrgios was having none of it.
He added: "That's insanity. The fact that, how is that possible they got every measurement correct and they're all aligned?
"And they did it with rolling large stones on logs is an insane statement.
"Why are the doors so big? Like who needs to walk through the doors if they're that big?
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"I don't know who it was. I just don't think that we were capable.
"It's 2024 and we can't even all get along.
"And you think that we built the pyramids? You're insane. That's insanity stuff."
The conversation then moved on to landing on the moon, to which Kyrgios said "I have my thoughts on it".
He then asked: "Who landed on the moon? Do you think the Americans did first?"
Theroux responded: "Is that a trick question?"
But Kyrgios, who is currently without a tennis world ranking having played one match in two years, insisted: "I'm just asking you."
And when they got on to the shape of our planet, Kyrgios was once again coy and non-committal.
Kyrgios told Theroux to go first and the broadcaster simply said: "The earth is round."
The Australian continued: "I'd probably be inclined to saying it's round.
"But I'm also not surprised if it was the other thing either.
"Maybe we need to have a beer and have this off the record."
Tennis stars’ new careers
PLENTY of tennis stars have stayed involved in the sport since retiring.
But others pursued very different careers. Here are some of the best…
- I reached French Open and Wimbledon finals as a teenager but I quit to become a nun
- I won Wimbledon mixed doubles with my sister but got fed up with English weather so now run luxury B&B
- I was tipped for stardom aged 12 but retrained to become high-flying lawyer
- I earned £9m and won French Open before setting up bistro with Brazilian model girlfriend
- I’m last Frenchman to win Roland Garros, now I’m singer with six albums hitting No1 in charts
- I'm former world No1 but quit aged 29 - instead I went on to play professional poker and golf
- I was destined for the top but swapped lobs for labs as award-winning Harvard physicist
Theroux replied: "Really? How deep does this thing go?"
And Kyrgios revealed: "It goes deep."
In the wide-ranging interview, Kyrgios also opened on his return to tennis, retirement, drinking habits and mental health problems.
He would do most of his drinking alone and further struggles saw him turn to self-harm - prompting him to wear a sleeve on his arm.
The 2022 Australian Open doubles champ explained that Andy Murray was one of the people who spotted cuts on his arms and offered him support.
Kyrgios added: "I was just struggling with being who I was, it was hard at that time and I didn't feel like I could take a step back from the sport and kind of work on myself and get myself in the right headspace.
"I was just playing and playing and playing and kind of dealing with everything.
"It was a dark time. I was drinking and I was spiralling out of control and I was continuing to play and travel. It was a lot."
Asked how many drinks he would have, Kyrgios added: "20 or 30 drinks, easy, I’d drink like a fish.
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"But then just wake up and play Rafa Nadal the next day. Give him a good run for his money."
- is available on Spotify now.
Help for mental health
If you, or anyone you know, needs help dealing with mental health problems, the following organisations provide support.
The following are free to contact and confidential:
- Samaritans, , 116 123, [email protected]
- CALM (the leading movement against suicide in men) , 0800 585 858
- Papyrus (prevention of young suicide), 0800 068 41 41
- Shout (for support of all mental health) , text 85258 to start a conversation
Mind,, provide information about types of mental health problems and where to get help for them. Email [email protected] or call the infoline on 0300 123 3393 (UK landline calls are charged at local rates, and charges from mobile phones will vary).
run a free, confidential parents helpline on 0808 802 5544 for parents or carers worried about how a child or young person is feeling or behaving. The website has a chat option too.
Rethink Mental Illness, , gives advice and information service offers practical advice on a wide range of topics such as The Mental Health Act, social care, welfare benefits, and carers rights. Use its website or call 0300 5000 927 (calls are charged at your local rate).
Heads Together, , is the a mental health initiative spearheaded by The Royal Foundation of The Prince and Princess of Wales.