Skateboard debuts as an Olympic discipline at the Olympic Games in Tokyo 2021. And in the SVT documentary "Oski - an Olympic skateboard saga" we get a unique insight into the blue-yellow hope Oskar Rozenberg Hallberg's journey to adapt to a new and even more goal- and competitive world.

- Skateboarding has always been very loose.

It is very disorganized, open and free.

There are not many rules.

People just drive their own thing, and it's been good as hell.

But now when it comes to the Olympics, you miss what football players and basketball players have, that they have to go to training every day, says Rozenberg Hallberg in the documentary.

- It happens about once in a lifetime that it is the first time the skate is at the Olympics.

I think that's why I've put that pressure on myself, because somewhere in the back of my mind I know there's a great risk that this will never happen again.

"Even partying"

The charge for the Olympics is completely different from the normal for the 25-year-old who has won double World Cup gold.

He does physique and running tests on Bosön, albeit in shoes that are not made for running, which can contribute to him being forced to interrupt.

While preparing for the 2019 World Cup in the USA, which "Oski" won, he chose to spend time with his friends in Poland.

- We just filmed and skated, and focused 100 percent on it, and even partyed a bit.

And then the week after I went to the World Cup, I really noticed that it helped me.

- Now it's almost the opposite.

For several months I have been focusing on this (OS).

But I realized yesterday, it's good for me to prioritize other things too.

Not just the obvious thing like talking to my family, he says in a conversation with mental coach Sverker Fryklund.

But Rozenberg Hallberg finds it difficult to acclimatize to the Olympic requirements, and the joy of the sport disappears more and more for him.

- I have thought a lot about this with psychological flexibility, and I notice a lot now that I have had too much focus on the Olympics.

I exclude contact with my family, tell my girlfriend that we need to talk less and less.

Thinks it all over.

It's not to my advantage.

It has become more serious.

I'm not used to things getting this serious.

"A big failure"

When "Oski" arrives in Tokyo and the Olympic Village, he is in ecstasy.

But he tells himself he's too happy.

- I can not be so happy, there will be some setback soon.

Once the competition day comes, he will go out in the qualifiers and miss the final.

And no joy is left.

- It felt like the press was getting too big, and suddenly it tipped over.

There was nothing of it, there is nothing you can do.

For many years I have not understood this that everyone says that you have to make mistakes to learn.

I've seen it more as that: but what, you have to do your best.

But that's not what this is about.

The Olympics were somehow a failure, a great failure from which I learned a great deal.

Watch "Oski - an Olympic skateboard saga" on SVT Play.