What successful professional cyclists don't do during the winter break. Some travel south to relax. Others jump on the MTB to race through the terrain. Marcel Kittel (Argos Shimano), four-time stage winner and wearer of the yellow jersey in the 2013 Tour de France, is working on his speed – together with Belgian rally driver Freddy Loix. On the race track in Zolder, he gave the fast driver from Arnstadt a driving lesson.