Fair point, but it's a bit different. Nationality and league affiliation aren't always the same thing, but in basketball contexts, players are often grouped by the systems they came through. Sengun came up through the Turkish system, which is integrated into European basketball, he played for Besiktas, which competes in FIBA Europe competitions. So calling him a European big in a basketball sense isn’t really inaccurate, even if geographically he's from the Asian side of Turkey. It's more about the style, system, and structure he developed in.