The competition, planned and bought by Carat Global Management, launches this week on and will be promoted across Europe.
Sports fans are encouraged to tell their story of how they achieved their sporting ambitions via the microsite created by Eurosport.
Those without a story to tell can participate and stand the chance of winning Adidas prizes by voting on other entries. Fortnightly winners will be put forward to a grand final, where an Adidas superstar will select the overall competition winner. The winner will then meet the Adidas athlete and have their story showcased on air and online.
Sascha Welters, global media manager at Adidas, said: "Eurosport is the ideal platform to spread the message of Impossible is Nothing across Europe. Through innovative integration of digital and traditional elements we activate and engage a sporting audience that is so important to the brand. Our consumer can watch what our athletes go through and then tell us their story, therefore celebrating their personal achievements."
Liz Rakowicz, account director at Eurosport, added: "The Impossible story campaign is the perfect vehicle to reach and build relationships with the Eurosport audience whilst underlining the Impossible is Nothing brand message."