Dortmund are not good enough to win titles in Bundesliga and Champions League recent seasons but they have good quality. They performed well in their group to be two eligible clubs and it shows their quality. PSV looks to be an opponent that does not outweighs Dortmund in quality and the first match shows it too. They are the host but only can equalize the match by a penalty and will face with big risk at Dortmund's home stadium.
In the group stage, Dortmund was indeed much better than the challengers who did not qualify for the next round, but entering the round of 16, the competition will be even tighter and Dortmund must appear consistent if they want to qualify for the next round. Dortmund's draw is good capital when playing at home because they are much more favored. Meanwhile, PSV will have a little more difficulty because they have to play more pressingly and if they are not able to defend, Dortmund could score a quick goal and take over the match, which will make PSV's chances of qualifying for the next round even smaller
Surprisingly Barcelona was forced to draw against Napoli, while Arsenal lost against Porto, while Inter Milan managed to beat Atletico Madrid with a smaller goal margin. This is quite an exciting match because in the second leg Arsenal, Atletico Madrid and Barcelona have to work hard to win the match if they want to qualify to the next round.