Peier fell during the Swiss National Championships and twisted his right knee, causing the injury.

Swiss-Ski doctor Walter Frey said a rehabilitation period of six to nine months is to be expected.

Peier won an individual large hill bronze medal at the 2019 Nordic World Ski Championships in Innsbruck in Austria.

The 25-year-old followed that up with a first World Cup podium last season, placing second at Nizhny Tagil in Russia.

This season's Ski Jumping World Cup is set to begin in Wisla in Poland on November 20.

Peier was an ambassador for the Lausanne 2020 Winter Youth Olympic Games, having competed at Innsbruck 2012.

Should Frey's recovery timeline for Peier's ACL prove correct, the athlete should be back in time to try and reach the Beijing 2022 Winter Olympics