Mateusz Siebert

Mateusz Filip Siebert (born 4 April 1989) is a Polish former professional footballer who played as a centre-back.

Early life
Born in Poland, he moved to France with his family at the age of three. His father Bernard is a former professional Polish footballer and his mother Renata a former handball player. He acquired French nationality on 3 November 1998, through the collective effect of his father's naturalization.

Club
He made his Ligue 2 debut in October 2008, coming on as a 25th-minute substitute against LB Châteauroux. In July 2009 he joined Arka Gdynia on a one-year loan with a buy option. His season ended in March as a result of injury. Despite wishing to retain him, the small club did not take up the buy option due to cost.

In February 2011, he joined Arka Gdynia on a two-and-a-half-year contract.

International
Siebert was a part of the Poland U-21 team.