The final leg of Grand Slam Track - the athletics competition backed by Olympic great Michael Johnson - is cancelled because of economic concerns.

Grand Slam Track has canceled the final meet of its first season, in Los Angeles, leaving the host of the 2028 Olympics and the country’s second-largest city without a major track meet this summer.

Grand Slam Track cancelled its Los Angeles meet on Thursday as the organisers brought the debut season of the novel athletics circuit to an abrupt end after three events.The Michael Johnson-fronted track series lured in top talent with super-sized prize money but saw poor attendance at its kick-off meeting in Kingston,