Arsenal boss Arsene Wenger was delighted with his young players after last night's 4-0 thrashing of Porto.

Robin van Persie registered his first goals in European competition for a year when he fired a well-taken brace while strike partner Emmanuel Adebayor also scored twice.

"The most important thing was to respond quickly in a convincing way to the game against Hull and that's what we did," he said.

"We were focused and I was happy with the attitude. Maybe we were too tense at the start of the game but we were focused and at this level that is vital.

"It's difficult to measure our best performance of the season but this was maybe our most complete performance.

"This is half the response I want. The other half comes on Saturday against Sunderland. I expect to win the group after this."

Wenger was delighted with the contribution of Cesc Fabregas and Theo Walcott, who caught the eye with a string of marauding runs down the right wing.

"I thought Fabregas was outstanding. He was good offensively and defensively. It was a complete performance," Wenger said.

"Theo was dangerous again and is always improving."