Theo Walcott says a purposeful start laid the foundations for Arsenal's 3-0 victory against Fenerbahce in Istanbul on Wednesday night.
Arsène Wenger's side controlled play for large periods but had to wait until the 51st minute for Kieran Gibbs to give them the lead.
It was a very disappointing result in the Premier League but we forgot about that. We concentrated on today - we knew the job we had to doTheo Walcott
"The tempo of the game was the key," he said. "Straight away, we got [at them]. We wanted to quieten the fans and we did that, even though it was 0-0 at half-time.
"Before that we dominated the game. They didn't have any shots on target in the first half. We just had to dig deep, tire them down and I think you could tell in the end that we were deserved winners.
"It was a very disappointing result in the Premier League but we forgot about that. We concentrated on today - we knew the job we had to do.
"We kept a clean sheet and got those three crucial goals that I think were well deserved in the end.
"It's nice to take them back to the Emirates [in control of the tie] but we can't be complacent. We have to be professional, which we will be."
Walcott set up the opener and was fouled for the penalty which led to Arsenal's third goal, and the forward was happy to play an important role in the victory.
"It's nice to get assists," he added. "The next thing will be to get a couple of goals now but it was more about the team and the performance tonight.
"To keep a clean sheet was important and to get three goals [at a difficult place], the guys can be proud of themselves."Copyright 2015 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 21 Aug 2013