Marianela Szymanowski

Szymanowski began playing football with the small Madrid suburban club Rayo Ciudad Alcobendas Club de Futbol from age 11 to 18. She then moved to Atlético Madrid, where she debuted in Primera División and in the Champions League with the club. She previously played for Atlético Madrid. After two years, Szymanowski left Atlético and signed with Rayo Vallecano, where she would play during five seasons before signing with Valencia. In 2011, she suffered an injury that forced her to provisionally retire until 2013. On 14 January 2025, Szymanowski joined Villarreal.

Szymanowski played for Argentina in the 2014 Copa América Femenina.

Szymanowski's brother Alexander played in La Liga for Leganés. Her paternal grandfather was a Pole born in 1923 in what is now Ukraine, who moved to Buenos Aires, Argentina at the age of five with his family, and later married with a Belarusian woman. Her maternal grandfather's parents were Spanish and her maternal grandmother's parents were Italian. She also holds Spanish citizenship, her full name in that document being Marianela Szymanowski Alonso.