2011 World Championships in Athletics – Women's heptathlon 2011 World Championships in Athletics – Women's heptathlon ] The Women's Heptathlon at the 2011 World Championships in Athletics was held at the Daegu Stadium on 29 and 30 August. Before the competition, reigning champion Jessica Ennis was top of the year's heptathlon rankings (6790 points) and was closely followed by Tatyana Chernova who had set a personal best. The 2009 silver medallist Jennifer Oeser was also in good form while Nataliya Dobrynska and Hyleas Fountain (first and second at the 2008 Olympics) were the other high-profile competitors. Tatyana Chernova won the gold medal finishing 129 points ahead of Jessica
2018 IAAF World U20 Championships total 156 countries (plus the teams from Authorized Neutral Athletes and Athlete Refugee team) and 1462 athletes are scheduled to compete. 2018 IAAF World U20 Championships The 2018 World U20 Championships in Athletics, also known as the World Junior Championships, are an international athletics competition for athletes qualifying as juniors (born no earlier than 1 January 1999) taking place at Tampere Stadium in Tampere, Finland on 10–15 July 2018. The championships were originally awarded to Tampere by the IAAF in March, 2016. USA won the ranking in the placing table. The following is a list of participating nations with the