Things have got really interesting in Group B after leaving the 2nd match week behind. Lens are currently the leader in this group despite their starting the Ligue 1 quite badly. They even defeated Arsenal which was quite surprising. Arsenal had the control of that match in fact but Lens still managed to find a way to win this match.
But I still don't expect Arsenal to lose the lead to them or any other team at the end of the group stage. I expect them to make up for this loss by staying strong against Sevilla in both matches. Sevilla were nearly defeating PSG with that poor match. But I feel like they can only get one point home from Arsenal and that's all.