Finland and Great Britain booked their spots in Division A with convincing wins on Saturday.
After a big win at home earlier in the week Great Britain visited Geneva and came away with an 89-78 victory which secured a 163-119 aggregate win.
A team-mate now stands in the way of Luol Deng fulfilling his international ambitions this summer.
In the last two months, the Chicago Bulls star has led Great Britain to four straight wins, allowing the Brits to force their way into a two-game play-off for promotion into Europe's Division A of basketball nations.
Great Britain sealed their place in Europe's divisional play-offs with an 83-51 win against Belarus in Minsk.
It was a tough game which both teams - the best units in the group - needed to win if they were to advance towards next year's EuroBasket 2009 qualifying matches.
Georgia’s attempts to win promotion to EuroBasket Division A received a significant blow on Wednesday when Iceland beat them right before the death with a three-pointer in a 76-75 upset.
Trying to keep pace with Group C leaders Finland, who are unbeaten at 6-0, Georgia led 74-72 but allowed Jakob Sigurdarson to nail a three-pointer with just two seconds remaining.
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