Arsenal manager Arsene Wenger says his side gave away "cheap goals" in their 2-1 defeat at Tottenham Hotspur.
The Frenchman was overall satisfied with the defensive performance of his side but was unhappy with how Arsenal's defensive department let striker Harry Kane score his two goals of the match.
"We defended well. We scored early but I think going forward, we didn't produce enough," Wenger said.
"When we went forward, we always looked dangerous to score but were we too focused to defend our goal? I think so.
"I believe that we made too many technical mistakes compared to our usual level, because of Tottenham in the middle of the park. They put us under pressure and we lost some balls we are not used to losing.
"They [Harry Kane's goals] were cheap goals. Tottenham didn't create so much, but I think we didn't produce enough.
"It leaves us with a big disappointment to swallow first and then to prepare for the next game."
The defeat saw Spurs leapfrog the Gunners into fifth place in the Premier League table but the Frenchman is confident there is enough time to bounce back and secure a top-four finish this season.
"We have played two more away games than Spurs," he said.
"[They] played 13 at home and 11 away. We have played 13 away and 11 at home. It's down to our home form now - we know we can win away from home but it will be a battle until the end.
"It has been every year with Spurs. We just have to focus on us, because there are many teams fighting to get in there [the top four]."
