Zetterstrom has discussed Eustace’s impact since taking over at Pride Park.
Zetterstrom believes Derby County will “achieve good things” under John Eustace.
The Rams have lost both of Eustace’s first two games in command since replacing Paul Warne at Pride Park.
Derby County suffered a 1-0 loss to Millwall in their first home match under new manager Eustace, following a 4-0 defeat at QPR just 24 hours earlier.
They have slipped down to 23rd in the table and are four points adrift of safety with 12 matches left to play, starting with Middlesbrough away on Saturday.
“The change in coaches does give a lot of energy to the group,” said Zetterstrom after the defeat to Millwall.
“You could just tell that from the way he works, on and off the pitch, that things are going to happen. The work we’ve put in this week has been extremely good.
“We have to be very positive throughout these remaining weeks, we’re going to achieve good things on the training ground and the matchdays.”
Zetterstrom saved a penalty from Josh Coburn against Millwall before Coburn scored in injury time.
