Sandy Duncan, who stepped into Broadway's Chicago later than expected this summer after breaking her foot, stepped out again Aug. 20 when she injured the same foot during the "Roxie" number in the first act of the night's performance.

Show spokespersons at the Pete Sanders Group announced that the injury was to the same foot, but it was not another break. "Preliminary tests point to a soft tissue injury, a tear to either a ligament or tendon."

No word yet on how long Duncan will be out of the show. Standby Nancy Hess went on over the past weekend; Belle Calaway, from the Chicago national tour, will take over starting Tuesday, Aug. 24.

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In April, Duncan broke her foot while in rehearsals with the national tour of Chicago in Sacramento, scotching her plan to join the tour and then hop into the Broadway cast May 25. All healed, she finally joined the New York cast Aug. 12.

As bad girl Roxie Hart, who murders her lover and aspires to a vaudeville career, Duncan is playing against the sweet, girl-next-door-type she nurtured in Peter Pan, The Boyfriend, My One and Only and TV's "The Hogan Family" (to say nothing of commercials for Wheat Thins).