Chicago cyclist Greta Neimanas finished seventh Thursday in the 3,000-meter individual pursuit, her first race at the 2012 Paralympics.
"Didn't have the race I wanted or that I can do," she tweeted. "Sometimes it happens. On to the next day & next race."
Neimanas, reigning world silver medalist in the event, clocked 4 minutes, 3.20 seconds. It took 3:49 to make the semifinals.
Sarah Storey of Great Britain, the favorite and eventual gold medalist, set a Para-cycling world record of 3:32.17 in the qualifying. That was a slightly more than a second better than her old world record.
Neimanas' next race is the 500-meter time trial Saturday. She also will do two road cycling events next week.