Lincoln City boss Steve Tilson says the Imps' midfielders must make more of an impact on matches after taking only one point from their first two games.
Ahead of Friday's Blue Square Bet Premier clash with Wrexham, Tilson told BBC Lincolnshire: "We haven't stamped our authority in midfield yet.
"They're so desperate to do well that it's making them nervous and the longer it goes on, the more nervous they get.
"We can certainly improve. I know they can do better and they know that."
Lincoln followed up a 2-2 draw at Southport on the opening day of the season with a 1-0 home defeat by Kidderminster on Tuesday.
Tilson added: "I'm not making them nervous, because I want them to go and express themselves. It's down to them when they get out there to do what I know and what they know they can do."