The away team Borås got off to a good start in the match when they started by scoring three straight three-pointers.
The team's star, Deandre Davis, had put five three-pointers a bit into the second period.
However, the home team would come back when they took command halfway into the second period.
A fast-paced attacking game gave Nässjö the lead with 38-36 at half time.
Even before the second half
Before the final period, the score was 55-57 to Borås who were whipped to win to get a fifth and decisive match.
Halfway into the period, Borås' Avery Woodson put a three-pointer to 65-62.
Borås then grabbed the baton and made a small jerk until 75-69 with less than two minutes left.
Nässjö did not manage to recover and Borås won 81-75.
The win means that it will be a fifth and decisive match in Borås.
- It was win or lose today so it was very nice to win.
We play with high energy and are involved throughout the match, says Borås Andreas Person to SBL Play.
ARCHIVE: This is where the basketball heroes land after the Swedish Championship gold - meet with cheers at the airport (April 28)
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Here, the ladies of Luleå Basketball are received by a small number of people at the airport in Luleå.
Hear how the players have celebrated and what they think about the gold match.
Photo: Erica Larsson / SVT