The failure of Michael Johnson’s attempt to transform track and field, the Grand Slam Track league, hovered over big swaths of the sport’s world championships this week.

Anna Hall joined Jackie Joyner-Kersee as America’s second winner of the world heptathlon title, wrapping up a wire-to-wire endurance test with cruise into the finish line to celebrate her biggest victory.

World champion Katarina Johnson-Thompson's Olympic bid ended early and abruptly on Wednesday when she collapsed to the track during heats for the heptathlon 200 meters.

The world champions of the decathlon and heptathlon are out of Olympic medal contention after breaking down during their last races of the day.