Mateo Klimowicz (born 6 July 2000) is a professional footballer who plays as an attacking midfielder for Liga MX club Atlético San Luis.

Klimowicz trained with Borussia Dortmund's academy at a young age, while his father was playing in Germany.

[2][4] He appeared professionally twice at the back end of the 2016–17 season in Primera B Nacional, participating in fixtures with Juventud Unida, aged sixteen, and Nueva Chicago as they secured sixth.

[2] He then scored his first goal in German football on 26 September, netting in a 4–1 victory at the Opel Arena versus Mainz 05.

[9] Klimowicz is eligible to play for Argentina, Germany or – with the obtainment of citizenship – Poland at international level.