Group A: Man United, Benfica, Basel, CSKA Moscow. The weakest of the groups to me, CSKA Moscow is a near-lock to finish bottom of the group unless they somehow bring back Musa and Doumbia or something. Basel should at least do better than their showing last season but not sure if they have enough quality to progress like they did in 2014-15. Man United should top comfortably. Oh, and for the boldest prediction of this entire post: Akinfeev will keep a clean sheet.
Group B: Bayern, Paris, Anderlecht, Celtic. Top spot in the group should be competitive, Anderlecht could possibly give them a game or two and should win v Celtic once, or both times.
Group C: Atlético, Chelsea, Roma, Qarabag. Would like to think Roma have a chance but they rarely seem to actually step up their game in Europe. Atlético should top the group but far from guaranteed. Nice experience for Qarabag.
Group D: Juventus, Barcelona, Olympiacos, Sporting CP. Juventus are better than Barcelona at he moment but who knows how long it will remain that way. Sporting CP isn't good enough, only made it because FCSB is even worse than them.
Group E: Sevilla, Liverpool, Spartak Moscow, Maribor. Doubt Maribor are good enough to progress but the other three teams could have a close battle for top 2. Not easy to call though Spartak Moscow the outsider for now.
Group F: Man City, Shakhtar Donetsk, Napoli, Feyenoord. Honestly think Shakhtar Donetsk will be the surprise of the group stage here having missed out last season but obviously Napoli will be favored. For once Man City is the highest quality side in a champions league group lol, and Feyenoord aren't ready to compete at this level.
Group G: Monaco, RB Leipzig, Besiktas, Porto. Tough to call this one. Only things I can really say is RB Leipzig will have their main focus on this competition, Porto haven't improved enough to stand out here, Monaco should still be good enough despite losing key players, and Besiktas are very strong.
Group H: Real Madrid, Dortmund, Tottenham, APOEL. Maybe APOEL can get a result or two. Dortmund should finish above Tottenham since they can give Real Madrid a game, and are the better side anyway + Spurs will not have Dele Alli for half the group stage.