Siva Karthikeyan a black belt in Karate?

VJ turned actor Siva Karthikeyan has a black belt in Karate, not in a film but for real. But when the young upcoming actor is involved in something, there is bound to be comic story that follows. Siva Karthikeyan has the certificate of him being a black belt in Karate safely locked in his locker. Guess why?
Although he was a qualified green belt, black was something even he hadn't thought about and hadn't earned it the way people usually do.Once, Siva Karthikeyan's Karate master had invited his father as a chief guest for a public event. As a token of thanks for accepting his invite, the Karate master summoned Siva Karthikeyan to the stage and announced that he was a ���first Dan black belt���.
Siva still has the certificate and every time he looks at it, he laughs about the incident. The actor revealed this truth during his appearence in Prakash Raj hosted Neengalum Vellalam Oru Kodi.