Considering Lens, it is true that they could not show the performance they expected at the beginning of the year, but their performance is gradually increasing. They had gained morale especially after the Arsenal win. They drew 1-1 with PSV yesterday. They still have a chance to get out of the group and they will want to advance to the next round by winning the other matches they will play. In the French league, they will try to win matches by reflecting their energy on the field. I think luck will slowly turn for Lens.
Winning Arsenal was the best moment Lens had in this season's Champion's League because they knew Arsenal was going to be the only team in the group that would likely win all their matches, and if they couldn't get a point against them, they may end up struggling to win other teams. Even though they have won, they were able to get one point each in their matches against Sevilla and PSV, respectively.
PSV is a team that is very strong to defeat in their own stadium because they are very strong at home. I will expect Lens to try their best to get a point in their returning leg against them; if they are able to do that, they have the opportunity to qualify for the round of 16 because I am very sure Arsenal will defeat Sevilla at the Emirate Stadium and will also likely defeat both Lens and PSV in the returning leg.