In a thrilling Champions League opener, AS Monaco pulled off a stunning 2-1 victory over Barcelona, thanks to 18-year-old Nigerian striker George Ilenikhena's debut goal.

Monaco's upset was fueled by Eric Garcia's early dismissal, receiving a straight red card in the 10th minute for fouling Takumi Minamino. The hosts capitalized on the numerical advantage, with Maghnes Akliouche slotting past Marc-Andre ter Stegen.

Barcelona's teenage prodigy Lamine Yamal equalized with his maiden Champions League goal, showcasing his clinical finishing.

However, Ilenikhena stole the spotlight, latching onto Vanderson's pinpoint long ball and unleashing a powerful shot past Ter Stegen in the 71st minute.

Monaco's dominance was nearly sealed when Vanderson's strike was pushed wide and Minamino's effort clipped the crossbar.

A late penalty controversy ensued as Folarin Balogun's spot-kick was overturned via VAR, deeming the forward to have simulated contact with Inigo Martinez.

The victory marks a statement win for Monaco, while Barcelona faces an early setback in their Champions League campaign.

Key Takeaways:

- George Ilenikhena scores on Champions League debut.
- Monaco exploits Barcelona's numerical disadvantage.
- Lamine Yamal impresses with equalizing goal.