And now Blake, a former 100m world champion and four-time Olympic medallist, has added his voice to the conversation.
"I believe all the events are very important," said the Jamaican. "This is people's careers. This is where they make their money."
(L-R) France's Jimmy Vicaut and Jamaica's Yohan Blake compete in the Men's 100m heats at the 2019 IAAF World Athletics Championships at the Khalifa International stadium in Doha on September 27, 2019. (Photo by Jewel SAMAD / AFP) (Photo credit should read
Image credit: Getty Images
On the decision to remove disciplines from the core list, he added: "That's a stupid move. He must enhance the sport, but he is killing it."
The first Diamond League of 2020 will be held in Doha on 17 April.