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
Sadiq Khan has said that his prospects of being elected London mayor could be damaged by the party's poor handling of racism accusations.
US President talks about meeting Royal toddler in his last address at the annual White House correspondents' dinner.
Clocks will go forward 30 minutes so there is half an hour more daylight in the evening when energy consumption peaks.