these men have won a fourth gold medal at the same games - Archie Hahn in the now defunct 60 metres, and both Jesse Owens and Carl Lewis in the long jump. Seven women have achieved the 100 metres and 200 metres 'Double' at the same Olympic Games - Fanny Blankers-Koen (1948), Marjorie Jackson (1952), Betty Cuthbert (1956), Wilma Rudolph (1960), Renate Stecher (1972), Florence Griffith-Joyner (1988), and Elaine Thompson-Herah (2016) and (2021). Five of these women were also members of the winning team in the 4x100 meters relay at the same games - Fanny Blankers-Koen (1948), Betty Cuthbert (1956), Wilma Rudolph (1960), Florence Griffith-Joyner (1988) and Elaine Thompson-Herah (2021). Fanny Blankers-Koen is the only one of these women to win four gold medals at the same games by winning the 80 metres hurdles in 1948. Competition format The Olympic 100 metres competitions are carried out under standard international rules, as set by the International Association of Athletics Federations (IAAF). The races are segregated by gender, with one for men and one for women. The 100 m is usually held at the beginning of the Olympic athletics programme as this allows athletes to compete in other events held later at the games – many 100 m athletes also compete in the 200 metres and the 4×100 metres relay events. Traditionally there are four rounds of competition: heats, quarter-finals, semi-finals, and finals. Prior to 1964, finals featured six athletes. For all Olympic competitions from 1964 onwards—allowing for a sufficient number of athletes being present—each race features eight runners. Athletes are seeded by past performance to ensure an even balance of quality across the heats and allow the best runners to progress to the later stages. Usually in the first two rounds the top three runners progress to the next stage. A small number of other athletes also progress as the fastest non-qualifiers (or "fastest losers") through a repechage system. Prior to 2012, the semi-finals stage comprised two races of eight athletes and the top four finishers in each race (regardless of time) were entered into the final. Several amendments were made to the competition format in 2012. Any participant not in possession of an Olympic qualifying standard time is entered into the preliminary round. Qualifiers in this round progress to the first round proper. The semi-finals stage is divided into three races: the top two progress to the final by right