In American indoor soccer. Now I think it was Christian's Grandfather who immigrated with his dad being American from the get-go. But there is a pretty tight cultural influence in these immigrant communities. The great Steve Zungul used to mentor a kid Jovan Kirovski growing up in San Diego.

Steve Zungul (the Lord of All Indoors, the Wayne Gretzky of indoor soccer)

Bronco Segota
Preki
Zoran Karic
Keder
Stan Stamenkovic

And many others. Some used to refer to the former Yugoslavia as the Brazil of Europe because of their emphasis on exquisite on the ball skills.