I already said in qualifiers, but I repeat again, something is wrong with Olympiacos this season. Now they lost 0:3 at home against Qarabag. Now they have 0 points after 3 games and 1:8 goals.
Union took win against Braga 1:2 after scoring 2 lates goals and now they're leading group with 9 points.
Think the way bookies balance out the odds like this have a lot to do with the money on the line. Roma at home, plenty of Romans betting on their own teams, so naturally odds always seem to shrink on home games. Not that Betis fans wouldn't be betting but yeah, that's always something of a value bet (away games on a level H2H).
United lost me money as I bet on them to lead at HT. Should have known better...