Beijing bronze medallist Servet Tazegul (under-68 kilograms) of Turkey is a major force, while at under-80kg, Azerbaijan's Ramin Azizov is a contender for gold in London. On the women's side, home star Sarah Stevenson - a bronze-winner four years ago - is a big medal hope at under-67kg, and Wu Jingyu (under-49kg) of China is reigning Olympic champion.
Hadi Saei: The Iranian claimed gold at under-80kg in Beijing having been crowned under-68kg champion four years earlier in Athens and taken bronze in the same division at Sydney 2000. His haul is matched by American Steven Lopez, winner of bronze (2008) and gold (2004) at under-80kg and another gold (2000) at under-68kg.
Juan Antonio Ramos: The Spaniard went into the Beijing Games as world champion at under-58kg but was on the wrong end of one of the sport's greatest upsets when he lost his bronze medal match to Rohullah Nikpai of Afghanistan, whose victory made him his country's first-ever Olympic medallist.
DID YOU KNOW?
Angel Valodia Matos, a gold medallist in the under-80kg category at Sydney 2000, was given a lifetime World Taekwondo Federation ban after attacking officials at the Beijing Games. The Cuban reacted to being disqualified from his heavyweight bronze medal bout for exceeding the injury time limit by pushing the referee and kicking a judge in the face.
FIRST APPEARANCE AT THE GAMES
Seoul 1988 (demonstration - medals first awarded at Sydney 2000)