Kayla HarrisonKayla Harrison won her second consecutive Olympic gold medal in judo, beating Audrey Tcheumeo of France in the 78-kilogram (172-pound) final and establishing herself as the best judoka in U.S. history Thursday before a packed house at Arena Carioca 2 in Rio&rsquo;s Barra Olympic Park.Harrison rolled through the brackets, winning her first two bouts by ippon, beating China&rsquo;s Zhang Zhehui in 43 seconds and Hungary&rsquo;s Abigel Joo in a minute and 45 seconds.(An ippon, which immediately ends a fight, is awarded for a move or hold judged as decisive.)Harrison, ranked No. 1 in the world in her division, had a tougher time with the much-taller Anamari Velensek of Slovakia in the semifinals but eventually got her into a leg lock halfway through the fight, forcing Velensek to tap out. That victory assured Harrison at least a bronze medal, making her just the second American to win two Olympic medals in judo.The first, Jimmy Pedro, is Harrison&rsquo;s coach.Harrison had been expected to fight Brazilian Mayra Aguiar, ranked fourth in the world, in the final. The two have built an epic rivalry over the years, meeting 17 times, with Harrison winning nine of those bouts. But the second-ranked Tcheumeo beat Aguiar in the semifinals, winning a scoreless match that was decided by penalties.The fight left Tcheumeo with a bloody mouth while the judo-mad Brazilian crowd booed the decision. Aguiar, however, came back to beat Cuban Yalennis Castillo in a bronze-medal fight, earning a standing ovation.Aguiar celebrated by climbing into the stands, where she was hugged by family and friends.Brazil has won more Olympic medals in judo then in any other sport.