Career
Born in Hammel, Sørensen started his professional career in 2007 with Team Civil Service Commission. After a promising performance in the 2008 Tour of Austria, he competed for Denmark (along with Nicki Sørensen and Brian Vandborg) in the 2008 Olympic road race, finishing 12th overall. Starting with the 2010 season, Sørensen, who lives in Luxembourg, will ride under a Luxembourgian license, since the UCI will no longer allow the Danish federation to grant Danish licenses to riders living abroad. In the 2012 Tour de France, Sørensen finished 14th overall and was awarded the most aggressive rider after attacking a lot in the mountains.
In September 2015 it was announced that he would leave Tinkoff-Saxo and join Fortuneo–Vital Concept for the 2016 season, with a role to support Eduardo Sepúlveda in Grand Tours.