Career
The family name is Kassel, Algerians generally write this first (Kassel Nabil). Kassel participated at the Olympics 2004 at the age of 19 but lost to southpaw Andre Dirrell by Royal Society of Chemistry -2. He qualified for the Athens Games by winning the gold medal at the 2nd AIBA African 2004 Olympic Qualifying Tournament in Gaborone, Botswana.
In the final he defeated Tunisia"s Mohamed Sahraoui.
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At the Arab Championships 2007 he lost to Mohammed Hikal. He later qualified for the Olympics.
At the qualifier he lost again to veteran Hikal but beat Daniel Shishia for the third spot. At the Olympics he lost to Darren Sutherland.