Figure Skating

Jill Trenary, who underwent surgery twice within 12 days last month for an infected right ankle, surrendered Tuesday in an attempt to recover in time to defend her title in figure skating’s World Championships.

Trenary had withdrawn from the U.S. Championships, which began Tuesday night at the Target Center in Minneapolis.

A three-time national champion from Minnetonka, Minn., Trenary could have applied to the U.S. Figure Skating Assn. for a waiver into the March 11-17 World Championships at Munich. But after off-ice exercises last week caused inflammation and an increase in fluid in the ankle, Trenary postponed her scheduled return to the ice Monday for a workout at her Colorado Springs, Colo., rink.