Great Britain Judo fighter Sophie Cox bowed out of the women's under-52kg when she lost her opening bout to Ae An Kum of North Korea.
Rochdale-born Cox, who returned to the sport having retired following the Athens Games, battled well during the opening stages.
However, she was caught by a Yuko score with one minute and 45 seconds left by the 2008 Olympic silver medallist, which proved enough for victory.
Cox felt the draw had not been kind to Team GB, saying: "I have found over the last couple of years if I can get through my first fight, then I can go on to do well, so this one was make or break.
"I did not worry beforehand she was an Olympic silver medallist, I just went out there to fight my own fight.
"But I just could not get it right and it was a tough draw. I felt fit and strong, it just did not happen today."
Cox turns 30 in December, but has not written off hopes of fighting at another Olympics in Rio.
She said: "I might be 29, but I still feel 25 in judo terms, but I will take a couple of months to take a look at things and see how British Judo want to go, but I will keep all doors open."
The atmosphere was still electric when Cox walked out.
"It did give me a really good buzz, even when I came off, they were still cheering, and that is amazing," she said.