daredevil Nah our defense is fine. They have had uncharacteristically poor moments this season but they are individually and collectively among the top 1% in world football. I can confidently say we have a better defence than Barca, Bayern, Madrid etc
What we lack compared to say, Madrid defensively is the experience in dealing with difficult moments in high pressured matches. However that will come with experience.
I don't remember Isak destroying us on the break. Our defenders just had a hard time dealing with him but we don't see that often. The likes of Haaland (a player with pace and power) would testify how horrible it is to play against them.
Oh and by the way, I was just saying I prefer facing Madrid to Barca because they can be got at, they'll still be favourites against us though. Mbappe hardly defends, Vinicius sometimes does, Bellingham works hard but is obsessed with scoring and being the hero ala Stevie Me (which can leave their midfield exposed etc). There's a better balance in the Barca team between attacking and defending and they seem very equipped to deal with the big teams - see the spankings they dished out to Bayern and Madrid this season.