US sprinter and former Olympic Champion Justin Gatlin may be excused for his failure to qualify for the IAAF World Championships 100m final, owing to sore feet.
The runner arrived at the Daegu championships last week suffering frostbite on both feet, having undergone cryogenic chamber treatment with wet socks.
His exit from the South Korea event in the semi-finals will have been a bitter blow for the 2004 champion, who only returned to professional sprinting last year following a four-year doping ban.
Describing his frostbite ordeal, the 29-year-old explained: "You wake up at 9 o'clock in the morning in Orlando and it's already 90 degrees F.
"So we're already hot, drenched with sweat. Get in the booth, socks were wet, socks froze to me instantly."
Gatlin's heat was eventually won by Kim Collins, while the final saw Jamaican Yohan Blake pick up the gold medal, after fellow countryman and world record holder Usain Bolt was disqualified for a false start.
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