Arsenal skipper Cesc Fabregas insists there is still plenty of room for improvement despite their eye-catching start to the season.
Fabregas scored twice during Tuesday's 6-0 Champions League rout of SC Braga.
The Gunners have won three and drawn one of their four opening Premier League games and are once again being mentioned as serious title challengers.
But despite the plaudits raining down on Arsene Wenger's side, Fabregas believes there are still areas where they can improve as the season progresses.
Speaking about last weekend's 4-1 victory over Bolton, he explained:"We made a mistake at the back towards the end of the first half and were punished.
"We cannot afford to do that at this level and it shows there are still things to improve on. In our defending as a team, we will need to get a little better to be at the top."
Meanwhile, Fabregas believes he is personally improving with every game.
"After being disappointed with my performance at Blackburn, I felt better on Saturday against Bolton," he added.
"Physically in terms of how I played, I was happier. But I would rather focus on the team, because the performance overall was a good one."