Group C is been dominated by Real Madrid having won all their three games, they are definitely sure to qualify for the next round of the UCL, it's really sad how union Berlin is performing so poorly at the champions league, so far they are yet to win or draw a single game in the UCL.
They are the only team in the group C of the UCL who is yet to get a single point, Napoli just as expected is doing well and have won two out of the three games they have played so far and I think they are sure going to qualify because meeting union Berlin I their next match at home will definitely be a tough one as they wouldn't want to be humiliated by Berlin at home so it's most likely a win with a small goal margin as Berlin would want to make sure they get a draw or possibly win in that match.
For Group C, it seems that Real Madrid and Napoli will progress to the next stage quite easily. Because Union Berlin and Braga don't seem to be able to match the performance of Real Madrid and Napoli. Even in this match, Napoli will definitely be the favorite because the match which will take place at Napoli's home ground will clearly make Napoli more confident to score more goals. And likewise, the Real Madrid vs Braga match will definitely belong to Real Madrid. Because there is a fairly clear difference in strength between Braga and Real Madrid.
Currently Group F is the fiercest. Because it is filled with strong teams, it is difficult to see who will qualify. But PSG seems like the one that will definitely qualify. But for one other team I'm not sure which team will qualify.