The five oldest and most prestigious one-day races in cycling.
Milan-San Remo, the Tour of Flanders, Paris-Roubaix, Liège-Bastogne-Liège and Il Lombardia. Winning one marks a career as much as a Grand Tour does.
Each has its own identity: Roubaix and its cobbles, Flanders and its walls, Liège and its Ardennes hills, San Remo the most open, Lombardia "the race of the falling leaves" in autumn.