Alejandro Estanislao Semenewicz, (also spelled Siemianowicz, 1 June 1949 – 1 April 2024) was an Argentine professional footballer who played as a defender or midfielder.

[1] He is considered to be one of the most decorated players in the history of Argentine side Independiente.

[2] Semenewicz mainly operated as a defender or midfielder and was known for his work ethic.

[4] Semenewicz died after suffering a heart attack on 1 April 2024, at the age of 74.

This biographical article related to Argentine football is a stub.