 He has been technically knocked out twice himself early in his career due to cuts, but after 2002, his next technical knock-out defeat came in 2008 against Andy Souwer in an extra round.From 2000 till 2002, Zambidis defeated notable kickboxer Jenk Behic twice, Gürkan Özkan twice (who outweighed Zambidis by 30 pounds), Baris Nezif, Wanlop Sosathopan, Bakari Tounkara, Matteo Sciacca and Petr Polak.In 2002, he knocked out the strong and experienced Dutch-Moroccan Hassan Kassrioui.