Sydney McLaughlin comfortably wins 400m hurdles heat | Tokyo Olympics | NBC Sports

American Sydney McLaughlin cruises through her 400m hurdles heat race to advance as the fourth-fastest qualifier. #NBCOlympics #Tokyo2020 #TrackAndField
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Most track events consist of a maximum of three rounds (first round, semifinals and final). The number of rounds in each event is determined by the total number of entries.

For events with the highest number of entrants, including the men’s and women’s 100m, there will be an additional preliminary round for athletes who have not met the ‘A’ nor the ‘B’ entry standards. Athletes who successfully advance through the preliminary round will compete in the main three rounds with the ‘A’ and ‘B’ standard athletes.

The men’s and women’s 10,000m events will consist of a final with no qualifying heats.

All field events will consist of a qualifying round and a final. Athletes who achieve the qualification standard during the qualifying rounds of each event will advance to the final. If fewer than 12 athletes reach the qualification standard in any event, the 12 athletes with the best performances in the qualifying round will advance to the final.

Each of the Olympic combined events (decathlon for the men, heptathlon for the women) is contested over the course of two days:

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Sydney McLaughlin comfortably wins 400m hurdles heat | Tokyo Olympics | NBC Sports
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