Freeski star Gu survives major scare in Olympic slopestyle
Double Olympic champion Gu lost her balance on the first rail during her initial run at Livigno Snow Park, scoring just 1.26 with the judges.
That put her under intense pressure, with the top 12 competitors progressing to Monday's final based on the better of their two runs.
There were no such problems for Switzerland's Gremaud, who soared to the top of the standings after a smooth first run on the sun-bathed course, posting a score of 76.68.
But Gu, second on the course, rescued herself in her second run...