Lisa Kearney is out of the Olympic Games after a 'golden score' defeat to China's Wu Shugen on Saturday.
The Belfast competitor took the last 16 contest into judo's equivalent of extra-time after the five-minute fight finished in a tie.
Shugen, ranked in the world's top 10, won after producing an Ippon throw which automatically ends a contest.
Kearney, Ireland's first female Olympic judo competitor, received a bye for the first round of the 48kg category.
The Belfast woman produced a hugely encouraging performance ahead of the Olympics as she finished second in the World Cup event in Tallinn, Estonia.
However, the 23-year-old was always going to be up against it after getting a tough draw for her London opener.
"I'm disappointed to have lost the fight and particularly in extra-time because it was such a close fight," said Kearney.
"But it's an Olympics Games and you can't get a higher standard that this.
"I'm still young and it's my first Olympic Games.
"It was a really good experience and it will stand me in good stead in the future."
Kearney's coach Ciaran Ward praised the Irish hopeful's performance.
"On paper the Chinese girl was streets ahead of Lisa but I wouldn't fault her at all," said Ward.
"Everything she did was correct but maybe she just didn't do enough of the correct things."