The 16th Diamond League season is under way as athletics' Olympic stars build towards their shot at world glory in 2025.
Athletes compete for points in 32 disciplines in a bid to qualify for the finals in Zurich in August.
That takes place just over a fortnight before the start of the World Athletics Championships in Tokyo, Japan.
All Diamond League events will be shown on the BBC, which has agreed a deal to broadcast the competition for the next five years.
It is also the first year in which the Diamond League must compete with Michael Johnson's new Grand Slam Track for athletes' attention.
However, there has been only one direct clash between the two competitions - with the Miami Slam on 2-4 May taking place at the same time as the meet in Keqiao, China on 3 May.
The Diamond League has increased its prize money to the highest level in its history, with a total prize pot of $9.24m (£6.95m) on offer across the series.
That includes $500,000 (£375,000) at each of the 14 series meetings, and $2.2m (£1.7m) at the Diamond League final.