Barcelona have been widely-heralded as the finest football team on the planet over the past three or four years, augmenting their plaudits with a trophy haul comparable to any of history's best sides.
After winning the UEFA Champions League in three of the last seven seasons—2006, 2009 and 2011—they were somewhat surprisingly beaten last season by a resolute and overly defensive-minded Chelsea side who went on to lift the trophy.
Under the guidance of Tito Vilanova this season, following Pep Guardiola's departure, FC Barcelona will be once more looking to establish themselves as the continent's best side by winning the Champions League once more.
Others, though, continue to also mark them out as one of the best teams—and raise their game accordingly in trying to beat them.
Here are six clubs that could win the Champions League ahead of Barça this season.