In an action on an express contract for the recovery of a liquidated sum of money only, if the answer admits any part of the plaintiff's claim or if the answer sets up a counterclaim for an amount less than the plaintiff's claim and contains no other defense to the action, the clerk, on motion of the plaintiff, shall render and enter judgment for the amount so admitted or for the amount claimed in the complaint less the amount of the defendant's counterclaim. When the defendant admits part of the plaintiff's claim to be just, the court, on motion, may order the defendant to satisfy that part of the claim and may enforce the order as it enforces a judgment or provisional remedy.
Wis. Stat. § 806.03