Team USA star skier Lindsey Vonn takes part in her first training session at the Winter Olympics, battling a serious injury two days before her first event.

American skier Lindsey Vonn successfully completed her mandatory downhill training run at the Winter Olympics just one week after rupturing her left anterior cruciate ligament.

The 41-year-old icon -- rocking a heavy brace on her knee -- tore through the brutal Olympia delle Tofane course in 1:40.33 ... finishing 11th out of 43 racers.