Jackson celebrates 200 win at worlds after Tokyo heartacheJamaica's Shericka Jackson is now a world champion after a mistake led to an early exit at the Tokyo Games.
Jamaica's Shericka Jackson out of 200m after rookie heats blunderThere were no such problems for her two compatriots in the 100m clean sweep as Elaine Thompson-Herah and Shelly-Ann Fraser-Pryce advanced safely through.