Michael Johnson insists he has not given up on Grand Slam Track after the circuit filed for bankruptcy protection

Michael Johnson insists he has not given up on Grand Slam Track after the circuit filed for bankruptcy protection

Michael Johnson's troubled Grand Slam Track athletics circuit filed for bankruptcy protection on Thursday, saying the move was necessary to stabilize finances after a crisis-hit inaugural season.

US Olympic legend Johnson launched Grand Slam Track earlier this year with the bold goal of transforming athletics, promising a concentrated format featuring more frequent head-to-head races between the world's best athletes.

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