Following the positive tests for heterologous blood doping by team members Alexander Vinokourov and Andrey Kashechkin, Astana did not have much chance to compete in 2007 and was limited in 2008.

Speaking to Dutch media, De Kort expressed his frustrations at not having the chance to compete after being in a similar situation in 2006 with the Liberty Seguros team.

In 2008, De Kort finished 5th at Driedaagse van West-Vlaanderen, 12th at the Eneco Tour and 4th at the Ster Elektrotoer.

[8] In June 2021, three of the fingers on his right hand were amputated following an accident while driving a vehicle off-road.

[11] Source:[12] Media related to Koen de Kort at Wikimedia Commons