Superstars set to clash in super-G

American star Lindsey Vonn and Swiss counterpart Lara Gut kick off an intriguing world alpine championships in St. Moritz when they go head-to-head in the women's opening super-G on Tuesday.

Vonn and Gut go into the race on the back of a couple of crashes on the World Cup circuit, but both have vowed nothing will be left in reserve come the secondary speed event of the world championships, which run through Feb 19.

"My body is pretty sore from hitting the nets two too many times," said Vonn.