Oscar Pistorius was dethroned as young Brazilian Alan Oliveira stole his Paralympic T44 200m crown with a powerful run, topping a successful night on the track for the South American nation.
But the 25-year-old Pistorius hit out after his shock silver that silenced the 80,000-strong crowd at the Olympic Stadium lats niht, complaining he was at a disadvantage because of the length of some of his rivals' artificial running blades.
"The IPC (International Paralympic Committee) don't want to listen," the South African "Blade Runner" told Britain's Channel 4 television. "The guys' legs are unbelievably long. Not taking away from Alan's performance, he's a great athlete.
"But these guys are a lot taller and you can't compete with the stride length.
"You saw how far he (Oliveira) came back. We aren't racing a fair race. I gave it my best.
"The IPC have their regulations. The regulations allow that athletes can make themselves unbelievably high. We've tried to address the issue with them in the weeks up to this and it's just been falling on deaf ears."
Pistorius, who had been seeking to defend all three of the T44 sprint titles he won in Beijing four years ago, said US bronze medallist Blake Leeper's knee height, for example, was "like four inches (10cm) higher than it should be".
"The guys are just running ridiculous times and they're able to do so. I think Alan's a great athlete but... I run just over 10 metres per second," he added.
"I don't know how you can come back, watching the replay, from eight metres behind on the 100 to win. It's absolutely ridiculous."
Deccan Herald is on WhatsApp Channels | Join now for Breaking News & Editor's Picks