The Potters host Liverpool this weekend.
Pieters told The Sentinel: "We're playing really well at home. Away we must be better, but at the Brit it's very good ... and we're getting better and better. We have to keep that going.
"Sunday is a good game to play against a good opponent, especially with (Luis) Suarez in their team, but we can look forward to it because of how we have been playing here."
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