By Rob Kelly

Olivier Giroud says Arsenal will head to Manchester United in confident mood - but must learn the lessons from their 7-5 win at Reading.

Arsène Wenger’s side were trailing 4-0 after just 37 minutes on Tuesday night, but mounted a stirring comeback to claim a famous extra-time win.

Giroud played a major role in the Gunners’ resurgence and scored their second goal, but says they must not allow themselves to get into a similar position at Old Trafford.

“It was better for us to win the game [ahead of Saturday’s match], it is good for confidence,” the France international said.

“But we have to remember our problems and correct them because while we were able to come back in this game, we might not be able to do so next time.

“At 4-0 down it is difficult to come back, so we have to concentrate better from the start of each game.”

Giroud earned praise for a superb performance at the Madejski Stadium, and the striker believes he is making big strides forward in every match.

“I try to go step by step, game by game,” he said. “I feel better and better and I trust in my quality and that I will be able to succeed with Arsenal.

“Although we have a difficult game [at Old Trafford], I am confident in our quality.”

Copyright 2014 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 1 Nov 2012