 He was born at Odense, Funen County.Having played six Youth One Day Internationals for Denmark Under-19s in the 1998 Under-19 World Cup, Klokker made his debut for Denmark in a List A match against Ireland in the 2000 ICC Emerging Nations Tournament in Zimbabwe.Shortly after this match, he played his second List A match against the Durham Cricket Board in English domestic crickets 2000 NatWest Trophy, a tournament Denmark were permitted to take part in.