Michael Johnson's Grand Slam Track is set for its inaugural season in 2025 - but what is it all about, what does it mean for athletics and will it come to the UK?

Grand Slam Track, a series of four meets in which 48 of the fastest men and women in the world race for $12.6 million in prize money, will begin in Jamaica in April and come to L.A. in June.

The sprinting legend knows that the sport's biggest crowds in the U.S. every year are at the Penn Relays, and he wants his new showcase to bring that same buzz.