in individual events is not affected by this rule. National athletics associations retained the right to confirm or reject athlete selections through this method. Where the highest ranked athletes were from a country that had already had three or more entrants for the event, or where the national association rejected an entrant, the next highest ranked athlete became eligible for entry via world rankings. Event schedule Results Men Track * Indicates the athletes only competed in the preliminary heats and received medals. Field Combined Women Track * Indicates the athletes only competed in the preliminary heats and received medals. Field Combined Mixed * Indicates the athletes only competed in the preliminary heats and received medals. Event summaries Sprints In the men's 100 metres, the semi-finals were dominated by world leader Christian Coleman from the United States, finishing in 9.88 seconds while no other qualifiers broke 10 seconds. In the final, defending champion American Justin Gatlin got a good start to gain a step on the field, except Coleman got a better start, gaining that step on Gatlin and extending his lead to a dominating victory in 9.76 seconds, a new personal best and world-leading time for the season that becomes the 6th best in history, just 2 ticks behind Gatlin's best. Returning to form, Canada's Andre De Grasse closed and nearly caught Gatlin at the line in 9.90, a new wind-legal personal best, though he has run as fast as 9.69 wind-aided. Middle distance Long distance The women's marathon began at midnight local time on 28 September with the temperature at and 70 per cent humidity. By the end of the race, 28 of the 68 starters had dropped out, including all three Ethiopian runners. Five runners in a lead pack stayed together for the first and the pack was down to only four athletes by , including Ruth Chepngetich and Edna Kiplagat of Kenya, Bahrain's Rose Chelimo and Namibia's Helalia Johannes. Chepngetich broke out into a sprint in the final lap to finish at 2:32:43, followed by Chelimo (2:33:46) and Johannes (2:35:15). The women's 10,000 metres began the following night with Germany's Alina Reh taking an early lead before falling back and eventually dropping out. By the ninth lap, a lead pack of three Kenyans and three Ethiopians developed. By the half-way point, the Netherlands' Sifan Hassan had latched on to back of the lead pack, headed by Kenya's