San Jose, Calif. • Jordyn Wieber looks ready for London. As for the rest of the U.S. women, they still have some work to do.

The reigning world champion was about the only one not affected by nerves Friday, breezing through the first night of the Olympic trials and all but assuring herself of the lone guaranteed spot on the five-woman London team. Wieber finished with 61.7 points, 0.3 points ahead of Gabby Douglas, who had to work out of a hole after making a big error on uneven bars, her first event.

Only the winner of the two-day trials competition is guaranteed a spot on the five-woman London team, with the remaining four to be picked by a selection committee following Sunday night's competition.

Aly Raisman, normally rock steady, finished a distant third after a big wobble on balance beam and going out of bounds on floor exercise, where she is the reigning world bronze medalist. Kyla Ross landed her vault on her backside and was fifth. McKayla Maroney fell off both uneven bars and balance beam and was seventh. And reigning Olympic champion Nastia Liukin, who needs high scores on the bars to advance, struggled badly.