Politics prevented North Korean judo expert Lee Chang Soo from representing his country at the Olympics until he eventually defected.
Defeat to a South Korean athlete in 1990 saw him punished with hard labour in a coal mine; his then pregnant girlfriend was forced to have an abortion so he could focus on his sport.
Now, he lives in South Korea where he hopes his sons can achieve what he could not.
Victory for one of his sons over a North Korean, he says, would be revenge.
Al Jazeera's Harry Fawcett reports from Seoul.