Albion have now kept three successive clean sheets at the Amex and four in the last six games, home and away.
Potter said of Dunk: “I thought his performance was sensational.
“I haven't seen him play as well as that but his performances have consistently been at such a high level.
“He has been fantastic for us.
“You look at the clean sheets. I'm not saying it has just been to Lewis.
“I'm sure he will say the same.
“But he has contributed in terms of how he led that line.
“He has been fantastic for us and today he was amazing."