Rebecca Adlington has admitted that she could call time on her career if she fails to make the grade at London 2012.
The 22-year-old rose to prominence four years ago as she became champion in both the 400m and 800m events in Beijing.
Despite heading into the games as a double gold medalist, Adlington has claimed that she would probably retire if she was absent from the British swimming squad.
Adlington told the The Times: "It wouldn't have been the end of the world if I hadn't made Beijing because London 2012 was always the target, but this time if I don't make it I would reassess everything and would probably retire.
"I'd have to ask the question, 'Have I really got four more years left in me?'"
Adlington is also the 800m world champion.