In a thrilling night in European football, Barcelona found themselves teasing fans with an unexpected Champions League collapse against Borussia Dortmund. Just when it seemed they had everything under control, the drama unfolded.

After a staggering 4-0 victory at home last week, Hansi Flick's squad appeared ready to coast into the semi-finals. However, they decided to create some anxiety for themselves against one of the weakest teams left in the competition.

The tension ramped up early when Serhou Guirassy converted an 11th-minute penalty. While it didn’t spark immediate panic among Barcelona supporters, his second goal, just four minutes into the second half, had fans gripping their seats!

But just as doubt began to creep in, a Ramy Bensebaini own goal restored some calm for the Catalan side. It looked like Barcelona would cruise to victory after that, but Guirassy wasn’t done yet. He made his mark again, taking advantage of a misplay from Ronald Araujo, reminding everyone that Dortmund was still in the game.

Dortmund relentlessly targeted Barcelona’s defense, showcasing the vulnerabilities in Flick's tactics. The Yellow Wall was electrified, sensing a dramatic turnaround could be on the cards.

Ultimately, though, Dortmund’s efforts were not enough to overturn the damage done in the first leg. Their performance highlighted a crucial takeaway for other teams: Barcelona can be exploited if you play the right tactical game.

Barcelona's recent success can be attributed largely to their spectacular attacking trio: Ballon d’Or contender Raphinha, 17-year-old sensation Lamine Yamal, and the evergreen Robert Lewandowski. However, their midfield creativity and defensive weaknesses are the aspects that might come back to haunt them.

When it comes to defense, only Jules Kounde stands out as truly reliable in Barcelona’s backline. The other defenders, including the promising Pau Cubarsi, may shine in attack but are still finding their footing defensively.

Niko Kovac’s tactics were spot-on compared to those in the earlier leg, highlighting a clear blueprint for managers in future encounters. This could spell trouble for Barcelona's next opponent, likely to be Inter, who have the talent to exploit these weaknesses.

While Barcelona ultimately emerged victorious over the two legs, it was a night filled with anxiety for the players and fans alike. Dortmund left everything on the pitch, especially Guirassy, who secured a hat-trick but still fell short.

For Arsenal fans, this match was a beacon of hope. With the possibility of facing Barcelona in the final, there’s a newfound optimism in North London. Arsenal and Inter remain unbeaten in this season's knockout rounds, while the road to Madrid might be a daunting one.

As the Champions League drama unfolds, the potential for an El Clasico final looms large. Barcelona have done their part to keep the dream alive—now it’s time for Real Madrid to step up and make it a reality!