Switzerland’s four-time Olympic ski jumping champion Simon Ammann remains in hospital with severe concussion after crash landing at the Four Hills tournament in Bischofshofen, Austria.     

A statement posted on the Swiss Ski Federation's website stated that the 33-year-old escaped serious injury in the crash on Tuesday but would remain in hospital for a few days.             

"He has a severe concussion and severe bruises to the face, but no broken bones," it said.

"Simon Ammann will stay a few days in the hospital in Schwarzach and requires absolute rest."             

Ammann, who won the large and small hill Olympic golds at Salt Lake City 2002 and Vancouver 2010 but missed out in Sochi last year, was left bloodied after toppling forward in the landing area after his 136-metre second jump and sliding face first across the snow.               

Stefan Kraft ensured there was a seventh consecutive Austrain winner of the event.