Arteta hails the young Arsenal's "maturity" in the victory at Chelsea

The 63rd header from their centre-back, Gabriel, provided

a 1-0 victory over the Blues in the London derby, as the Gunners retained top of the league from Manchester City, who temporarily led the Premier League with a Friday victory over Fulham.

Arsenal's manager

told his post-match interview with

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"We wanted to get back to the top, but the competition is so difficult in this league. The challenge for us was to come to this stage and play against a top team to perform and win the game and the boys did that."

On what impressed him the most, the Spaniard added:

"I think for such a young team the maturity they showed, the composure, the resilience and the courage to play the way we wanted to play it was phenomenal. It's easy to say it before the game but to do it against these opponents it's a different story.

"Winning against these opponents in this stadium I think is another step for these players to keep believing that they can do it under pressure against big opponents and we have to enjoy it."

Although the former Man City striker

failed to score a goal, the Spanish coach is impressed by the energy hi brings to his side. He said:

"The energy that he transmits to the team is just phenomenal, that to me is his biggest quality. His all-round play I think it was phenomenal how he competes, how he holds the ball, the movement, the anxiety and uncertainty he gives opponents.

"It is something that has taken us to a different level, we've said that from the beginning. He's done it again and while he didn't score, I thought he was outstanding."

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