Branislav Ivanovic says there is plenty more to come from Chelsea when the Premier League returns after the international break.
Chelsea got their campaign up and running with a comfortable win against Hull on the opening day of the season but have had a tough time of it since then, going on to record their worst start since Roman Abramovich bought the club.
That included three straight defeats in all competitions, however the Stamford Bridge club signed off with with a win against Norwich that took them up to 3rd before players departed for the upcoming World Cup qualifiers.
Invanovic believes Chelsea still have plenty of room for improvement under Jose Mourinho, who is in his second spell in charge at Stamford Bridge.
"There's still a lot of hard work to do. We've played some good games; we've had some defeats, too," the Serbian told Chelseafc.com.
"The team and our performances can improve, we can do better and I think we'll do it after this international break."
Chelsea will resumer their campaign with games against Cardiff, Schalke and Manchester City which kickstart a run of seven matches in 21 days.
Ivanovic will likely feature in most of them and says he is happy to help the team out in any way possible, and is content to play at centre-back or on the right of defence.
All my career I've moved inside and outside," he said.
"I'm really happy because it's good for me that I can play both positions. I always try to do my best wherever I play.
"In the end I'm happy because I like to defend, and I'm really enjoying defending in this team."