Akanji said: "It wasn't easy. We scored a goal on the counter-attack. The defender slipped early and the efficiency was there (from Erling Haaland). He scored a great goal.
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"We know how hard it is to play against Brentford, with their back five. That's why we tried to attack and we didn't run into too many counter-attacks. I can't remember too many big chances they had.
"After the weekend we had to show a reaction and I feel we did that. Now we have to improve game by game."
On Haaland's goal, he added: "I was just thinking: 'Please score!' The second chance we had, we failed to finish the game. Unfortunately the keeper made a save, but we got the win."