The judo bronze medalist hit a man after he threw a bottle on to the track at the start of the men's 100m final last night.
Edith Bosch was standing close by when a green plastic drink bottle was thrown from the stands behind the start line.
Her involvement was brought to public attention on Twitter, where she wrote: "A drunken spectator threw a bottle onto the track! I HAVE BEATEN HIM... unbelievable."
She later told Dutch television station NOS TV: "I had seen the man walking around earlier and said to people around me that he was a peculiar bloke.
"Then he threw that bottle and in my emotion I hit him on the back with the flat of my hand.
"Then he was scooped up by the security. However, he did make me miss the final, and I am very sad about that.
"I just cannot understand how someone can do something like that."
More top news
The mother of "bucket list" cancer patient Stephen Sutton has said signs of her son's illness were "ignored".
Boxing champion and occasional actor Mike Tyson has been praised for coming to the aid of a motorcyclist injured in a crash in Las Vegas.
A website is threatening the release of hacked nude pictures of Emma Watson, reportedly in response to her speech on gender equality.