Ryan Shawcross has admitted he is disappointed with his own form this season and hopes the Stoke defence can tighten up.
The Potters proved hard to break down last term but have so far failed to keep a clean sheet in their opening five Premier League matches and are languishing towards the bottom of the table.
Shawcross recognises that the back four need to do more as a unit, while he is also looking to improve personally.
"I'm never happy - I want to be playing better every week," said the 22-year-old.
"At the moment, it is just about getting consistent and hopefully we can get a few more clean sheets.
"You could say we're not performing very well because we haven't got a clean sheet yet."
Shawcross' performances last season earned him a call-up to Fabio Capello's England squad, a standard he is striving to reach once more.
"I want to get back in the England squad and I think everyone knows it," he said.
"But I've got to show on the pitch that I'm good enough, so I need to start doing that."
The immediate challenge facing Shawcross and Stoke is a Carling Cup game against Fulham on Tuesday, with the defender aiming for a long run in the competition.
"It's a game that we are all looking forward to," he said.
"We want to do well in the cups this year - it is something the club needs to strive for. If the gaffer puts out a strong team, I'm sure we will be fine.
"Everyone wants to get to cup finals and we are no different. Hopefully we can get the win against Fulham and push on."