LIMOGES, France (Reuters) - German Marcel Kittel of the Etixx-Quick Step team won the fourth stage of the Tour de France, a 237.5-km ride from Saumur on Tuesday. Kittel beat France's Bryan Coquard (Direct Energie) by less than a tire's length. Slovak Peter Sagan (Tinkoff) was third and retained the overall leader's yellow jersey. (Reporting by Julien Pretot; Editing by Ken Ferris) More...