Frédéric Sinistra (13 January 1980 – 15 December 2021) was a Belgian kickboxing champion who died from COVID-19.

Sinistra was nicknamed "the Undertaker", and at one time was called "Belgium's strongest man".

[3] Opponents that Sinistra defeated included Stefan Leko and Dževad Poturak, while he was defeated by Badr Hari,[4] Grégory Tony, and Patrice Quarteron.

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