Brighton boss Roberto De Zerbi was full of praise for Evan Ferguson after he scored his first Premier League goal.
Ferguson came off the bench to score a second half goal against the Gunners.
It wasn't enough to spark a comeback with Brighton losing 4-2 at home to the league leaders.
But Irish eyes were smiling with Ferguson having burst onto the scene with the Ireland Under-21s.
And De Zerbi said: "He's (Ferguson) a good player, he has very big potential, like Sarmiento, like Encise, like Lamptey, like Billy Gilmour and Colwill.
"I think the game has been strange, a strange result, it was strange the way Arsenal scored. I'm happy for my players, for our performance against a great team.
"Arsenal have fantastic players and a fantastic coach. I'm sorry for the (disallowed) goal because I think it changed the game, closed the game.
"It was a crucial moment, but we are very young. I think we have to improve our understanding of difficult moments in the game...
"I'm happy for the quality of the play, for the attitude of my players, for their bravery and courage. For the result, I'm sad but we have to improve. When you have younger players you have to improve and work."
The win mean Arsenal now have a seven point lead at the top of the table after Manchester City drew to Everton on Saturday.
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