Mark Lopez of the United States, in red, battles Nesar Ahmand Bahave of Afghanistan in taekwondo 68kg matches on Thursday, August 21, 2008, in the games of the XXIX Olympiad in Beijing, China. Tom Fox / MCT

Mark Lopez of the United States, in red, battles Nesar Ahmand Bahave of Afghanistan in taekwondo 68kg matches on Thursday, August 21, 2008, in the games of the XXIX Olympiad in Beijing, China. Tom Fox / MCT

Diana Lopez of the US (R) receives instructions from her coach and elder brother Jean before her fight against Azize Tanrikulu of Turkey in the quarter-final women's -57 kg taekwondo match during the 2008 Beijing Olympic Games in Beijing on August 21, 2008. BEHROUZ MEHRI / AFP/Getty Images

Mark Lopez (blue) of the US fights with Daniel Manz (red) of Germany in the quarterfinal of the men's -68 kg taekwondo match during the 2008 Beijing Olympic Games in Beijing on August 21, 2008. JUNG YEON-JE / AFP/Getty Images

Diana Lopez of the US (blue) fights against Azize Tanrikulu of Turkey (red) during the quarter-final of the women's -57 kg taekwondo match during the 2008 Beijing Olympic Games in Beijing on August 21, 2008. Azize won the match. BEHROUZ MEHRI / AFP/Getty Images

Mark Lopez (R) of the USA lands a kick on Daniel Manz of Germany in the quarterfinal of the men's -68 kg taekwondo match during the 2008 Beijing Olympic Games in Beijing on August 21, 2008. JUNG YEON-JE / AFP/Getty Images

Diana Lopez, of the U.S. , celebrates after defeating Italy's Veronica Calabrese during the bronze medal match for the women's taekwondo -57 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Rob Carr / AP

Mark Lopez of the U.S., left, dodges a kick by South Korea's Son Taejin during the gold medal match for the men's taekwondo -68 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Taejin won the match. Rob Carr / AP

Match winner Diana Lopez of the U.S., left, fights Italy's Veronica Calabrese during the gold medal match for the women's taekwondo -57 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Matt Dunham / AP

Mark Lopez of the U.S., left, kicks South Korea's Son Taejin during the gold medal match for the men's taekwondo -68 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Taejin won the match. Rob Carr / AP

Diana Lopez of the U.S. reacts after being defeated by Turkey's Azize Tanrikulu in a quarterfinal match for the women's taekwondo -57 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Matt Dunham / AP

Peru's Peter Lopez, left, fights Mark Lopez ,of the U.S., during a semifinal match for the men's taekwondo -68 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Mark Lopez won the match. Rob Carr / AP

Mark Lopez, of the U.S., celebrates after defeating Peru's Peter Lopez during a semifinal match for the men's taekwondo -68 kilogram class at the Beijing 2008 Olympics in Beijing, Thursday, Aug. 21, 2008. Rob Carr / AP