Great Britain's Paul Goodison and Ali Young both saw their London 2012 medal hopes ended on Saturday.
After a successful day on the water for the British sailing team on Friday, Saturday afternoon proved a disappointment as the duo's podium hopes were extinguished.
Reigning Laser gold medallist Goodison came into the regatta amongst the favourites but has struggled all week due to a back injury picked up in just the second race.
The Yorkshireman came off the water in tears on Tuesday but fought on courageously to complete the 10-race opening series.
Goodison secured a ninth and then an eighth on Saturday to leave him sixth overall, meaning he will compete in Monday's medal race but without a chance of a medal due to the points margin.
Olympic debutant Young is in the same situation after fleet racing came to a close in the Laser Radial class.
The 25-year-old began the Games in fine form and was third overall midway through the regatta.
However, Young began to taper off and saw her hopes of a top-three finish ended on Saturday as she was black flagged in the afternoon, before then finishing fourth in the last fleet race.