The 21-year-old, who turned one this week and was congratulated with a song by Mats Wilander, was overjoyed after his second Grand Slam victory in Paris.
Two years ago, she won the tournament like a giant bang.
This year, she did it as a favorite after taking over the women's tennis throne after Ash Barty resigned last winter.
The victory in the French Open was her sixth straight tournament victory and the 35th winning match in a row - the best suite of the 2000s.
The fact that the Polish compatriot, the national idol and Bayern Munich icon Robert Lewandowski were there gave an extra bonus to the victory, which brought in SEK 32 million.
"I did not know that Robert Lewandowski was there and I am glad that I did not know about it because I would have been stressed," Swiatek told Reuters.
"He has been a superstar in our country"
Afterwards, she was proud of Lewandowski's presence.
The look when she saw that Lewandoski was in place testifies to a shock of joy.
They were also hugged in the stands.
- I'm honestly glad he was here.
I do not know if he is a big tennis fan or not but it is so cool no matter what, says the 21-year-old who can not stop talking about Lewandowski.
- He has been a superstar in our country for so many years and it is difficult to accept that he came here to watch me.
I hope he liked it.
I hope he comes back, yes I do not know.
I'm just so overwhelmed, says Swiatek.
Lewandowski appreciated what he saw.
"What a game!
Congratulations Iga, you did it! ”
writes Lewandowski on Instagram.
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Iga Swiatek managed the press - won the French Open Photo: Bildbyrån