Montenegro were among the favorites to win promotion before the start of EuroBasket Division B and eight victories in eight Group A games suggests they will be successful.
Dusko Vujosevic's side remained undefeated with an 82-65 victory at Denmark on Saturday.
The Netherlands rolled to an 82-54 triumph over Denmark on Wednesday to finish their EuroBasket Division B campaign with five wins in eight games.
With Montenegro having already wrapped up first place in Group A and a spot in the play-offs, the Dutch played for pride and signed off in style with Bryan Defares' 17 points and six rebounds leading the way.
The Netherlands defeated Austria for the second time in EuroBasket Division B to take a firm grip on second place in Group A.
Gadi Kedar's men, who claimed a narrow victory in the first encounter between the sides in Austria, completed a sweep by rolling to an 83-60 home triumph.
Austria gave their bid to finish second in Group A of EuroBasket Division B a shot in the arm with a 92-61 mauling of Denmark on Saturday on Oberwart.
After winning two of their four games last year, the Austrians began the 2009 campaign in style after storming out to a 28-14 advantage.
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President: Michael Honore Bloch
Secretary General: Rasmus Winkel