Sweden's Mikael Ymer is in the quarter-finals of the Stockholm Open.
He has knocked out two higher ranked players so far – Quentin Halys and Tommy Paul.
The support from the stands has been great in the Royal Tennis Hall.
Especially from the bottom row on one short side, where Rafael Ymer watches the matches.
- He has a coaching role, says Mikael Ymer about his little brother.
- He means everything to me.
I bring him as often as possible and permits, he has school and his own career too.
What does his presence during the matches mean?
- I am a person who goes a lot through vibrations and energy.
Having a family that can contribute with that is everything.
During the matches he reminds me of things I need to be reminded of, which you can forget in the heat of the moment.
Meet the star: "A good friend"
Now Ymer faces world star Stefanos Tsitsipas, ranked fifth.
The Greek and the Swede are good friends.
- We have known each other since we were 11 or 12 years old.
We are in contact and write a lot.
He is a good friend.
I like him and his family very much.
Ymer has faced Tsitsipas four times in his career and lost all matches.
- He has been too good.
But there will be a new puzzle to put together now.
It will be interesting, says Ymer.