Olympic 1500m champion Faith Kipyegon will start her preparations for a third Olympic crown at the Xiamen Diamond League meeting in China on Saturday.
Kipyegon, a three-time world champion who has not lost over 1500m since 2021, faces a tough opening test against 10 women who have run below four minutes — including world 10,000m champion Gudaf Tsegay.
The star-studded lineup includes world champions Modo Duplantis and Sha'Carri Richardson.
Richardson, 24, begins her campaign by racing over 200m in Xiamen before she is joined by Jamaica's world 200m gold medallist Shericka Jackson and Britain's Daryll Neita in Suzhou one week later.
Duplantis will begin his bid for a fourth successive title by competing in Xiamen and Suzhou, with Americans Christopher Nilsen, Sam Kendricks and KC Lightfoot for company.
World indoor 60m champion Christian Coleman begins his Diamond Trophy defence in the 100m by taking on 2022 world champion Fred Kerley and Jamaicans Yohan Blake and Ackeem Blake.
British world indoor 800m medallist Jemma Reekie will test herself against world 800m champion Mary Moraa in Doha in May as she looks to put herself in contention at Paris 2024.
Also in Doha, recently crowned world indoor pole vault champion Molly Caudery is set to go up against joint world champions Katie Moon and Nina Kennedy.
Ten Diamond League meetings are scheduled to take place before the Olympic Games in Paris, with London offering the final opportunity for Olympic preparations on July 20.
In addition to the Diamond Trophy, each of the 32 champions crowned across the 16 disciplines in Brussels will receive Sh3.9m in prize money.
Athletes will compete for points at the 14-meeting series; from May to September.
Those points are awarded on a scale from eight for first place to one for eighth place.
After the 14th meeting in Zurich, the top six ranked athletes in the field events, the top eight in track events from 100m-800m, and the top 10 in the distances from 1500m upwards each qualify for the final.
The final is then a winner-takes-all competition to be crowned Diamond League champion.