Argentina's Sebastian Crismanich won an Olympic gold medal in taekwondo on Friday, winning a cagy final in the men's 80kg division.
Crismanich, 26, beat Spain's Nicolas Garcia by a single point to nil in a defensive final in which neither fighter took the initiative to attack.
Earlier in the day, Lutalo Muhammad of Britain and Mauro Sarmiento of Italy won bronze medals in the division.
