Arsenal manager Arsene Wenger says his side had to work hard to beat Nottingham Forest on Tuesday evening.
The Gunners eased past Philippe Montanier's side by 4-0 but the Frenchman believes it wasn't as easy as the score suggests.
He also praised new signing Lucas Perez after he scored his first two goals for the club.
"We got there in the end but the game was tough, Nottingham Forest played with full commitment," Wenger explained.
"We needed to be patient and as well not to concede a goal - which we did well. Overall I felt that technically we played well, our combinations worked well and we played at a high pace and that's where we made the difference in the game.
"We suffered in the first 20 minutes a little bit and that goal [Granit Xhaka's goal] helped us.
"After that I think everybody was focused to play the way we want to play football, sharp movement of the ball, great mobility in our team, always quick to move the ball and overall it was a convincing performance. We had some young players who did well and Lucas scored as well so overall it's a positive night.
"For me the most important is that we win the game, not who scores - it's not so important. Individually, it's good because he can convince people that he has the level to play for us and it will help himself as well to grow in belief.
"The second goal [from Lucas] has technical quality and desire, determination and fighting spirit. I liked the second goal for that, I liked as well the goal he made for Oxlade-Chamberlain. I'm very pleased for him."