John Watson has hailed three-time Formula One world champion Niki Lauda as the "most courageous" man in sport, following his death aged 70.
The former racing driver "passed away peacefully", his family said on Monday in a statement reported by the Austria Press Agency.
Watson, who was a team-mate of Lauda at Parmalat and McLaren in the 1970s and 1980s, was one of the first people to attend to the Austrian following a horrific crash at the Nurburgring in Germany in 1976.