TOKYO:

Noah Lyles and Sydney McLaughlin-Levrone lead the US medal charge at the world championships in Tokyo that get under way on Saturday while Armand Duplantis is expected to cement his legacy as the greatest pole vaulter in history.

They will be followed by some of the sport's biggest names -- Faith Kipyegon, Karsten Warholm and Femke Bol among them -- as they seek to etch their names into the history books over nine days of action.

This world championships, for which all female athletes will have undergone a mandatory gene test, will close a season that has featured 15 thrilling Diamond League meets and Michael Johnson's fledgling Grand Slam Track series.

Grand Slam was launched in the hope of bringing the top track performers together, but it floundered and the fourth of the fou

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