Ngoan defeated Jumaa Haya of Canada in the final of the women’s 61kg category.
Ngoan led 1-0 in the first two rounds. Haya received three points in the third set to lead 3-1. However, the Canadian made four mistakes during the match, which was enough for the referee to announce she was the loser.
The Southeast Asian Games silver medalist Ngoan earlier received a bye in the first round match. She defeated rivals from Turkey, Switzerland, the US, France and Austria, on her way to the gold-medal match.
The Karate 1-Premier League is one of the tournaments that athletes used to collect points to qualify for the Tokyo Olympics in 2020.
“The gold medal is a historic title for Vietnam, as it is the first time our martial artist has won in this prestigious tournament,” said Vu Son Ha, head of Karate Department of the National Sports Administration.