It was a very exciting match because PSG, unlike usual, would get defeated, PSG would usually always win in every match they faced. Kylian Mbappé could not play well because Borrusia Dortmund always controlled Kylian Mbappé's steps so that it was not easy for him to get the ball well until the match ended. PSG had difficulty scoring goals.
Before the match started, I also thought that Borrussia Dortmund would make it difficult for PSG and it turned out that actually happened in that match. And in the second leg I think PSG will also try hard to beat Borrussia Dortmund at home because PSG only lost by one goal in the first leg. But because their match is in the UCL, of course both of them will not be so easy to win because the second leg match is a super important match for them so they will give all their abilities in the second leg later.
Actually, PSG did not play badly in the match in Germany. They took a lot of positions, Mbappe had shots that hit the post, but it doesn't happen when there are no goals. They will try to win in France today. A vital day for Dortmund. They are very close to reaching the final, but they must not make mistakes. Mbappe will also want to win the UCL cup without leaving the team. That's why we need to get to the final first.