Cape Town - Gunners keeper Petr Cech believes the club's inconsistency against teams they are expected to beat has been Arsenal's downfall in recent seasons.
"We did well in plenty of games, and even in the big games, but we dropped some points in the matches where we were the favourites and weren't expected not to win," he told the club's official website.
"We need to improve that, we need to avoid silly losses of points in the games where you play better, you have chances and in the end you drop points.
"I think that's the only thing we need to improve because otherwise we had a very positive and good campaign last season. We finished second, which was the best finish in some time.
The 34-year-old also mused on the changes he has seen in the English top-flight since signing for Chelsea in 2004.
"The Premier League becomes far more competitive every year. It's gradually improved because when I came, you could see the difference between the top half and the bottom half of the table," he explained.
"But now there is no big difference because everybody wants to join the Premier League, everybody wants to join the atmosphere, the excitement and play in front of full stadiums."