#2 Barcelona
The Catalan club have failed to be convincing in any of their group games so far. They began with a 0-0 draw to Borussia Dortmund that many were surprised that they didn't lose. It was followed by a home victory against Inter Milan that saw them step it up and take the game to Inter and although they were good, they reverted to type against Slavia Praha in the third group game.
Barcelona are expected to be top of this group, but given their rocky start and the calibre of opponents they've faced in this season's "group of death", the 7-point-haul at the top of the group is looking more impressive.
Ernesto Valverde needs to make his team play good football more consistently but once they're clicking, it'll be fun to watch them take teams apart on a regular basis in Europe.