By Chris Harris

Bacary Sagna has urged Arsenal to learn lessons from their defeat at Chelsea.

Arsène Wenger's side controlled large chunks of Sunday's London derby at Stamford Bridge but squandered a string of opportunities including two in the opening minute of the game.

Chelsea made them pay with a well-taken first-half opener from Didier Drogba and a venomous free kick from Alex with five minutes remaining. The result leaves Arsenal seven points adrift in the Premier League title race and Sagna admits they must be more ruthless.

"I feel sad and I am disappointed as well because we played quite well," he told Arsenal.com.

"We lost the game but we have to try and do better next time. We have to learn from this game and we have to score goals because we had the opportunities to do it. We are disappointed."

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 4 Oct 2010