The 2015 Tour de Ski was the 9th edition of the
Tour de Ski. The Stage World Cup event began in
Oberstdorf, Germany on January 3, 2015, and ended in
Val di Fiemme, Italy on January 10, 2015. The titles were being defended by
Therese Johaug (Norway) and
Martin Johnsrud Sundby (Norway), the former of which came second to
Marit Bjørgen, while Sundby initially retained his title until it was passed on to
Petter Northug when Sundby was stripped of the title.
On July 20, 2016, Sundby was stripped of the win due to illegal use of asthma medication during the race.[1]