The series is played to two wins. The return match will be played on Tuesday in Bar.
Buducnost had a six-point lead on two occasions in the opening minutes, but Barani came close to minus two midway through the quarter, 15:13, thanks to a Mason basket.
Then the guests turned the score around with three-pointers by Islamović and Vranješ, 21:19, but Buducnost still won the first period 29:25.
Mornar held on in the first two minutes of the second quarter, when they took a 35:33 lead, and then after Žakelj's timeout, Buducnost went on an 8:0 run. Jovanović, with just over three minutes left before the break, gave the home team their first double-digit lead, 51:40.
The "Blues" ended the first half with a 10:0 run and went into the break with a plus 19 lead of 63:44.
In the third quarter, Budućnost continued to "break" the resistance of their rivals, and after Kovlijar's points, there was a 30-point difference, 77:47, midway through the game. After 30 minutes of basketball, the team from Podgorica was up 24 points, 83:59.
The last quarter was practically a showpiece game, and it should be said that Žakelj also gave a chance to talented cadets Ilija Radović, Luka and Miloš Knežević, and Mateja Obradović.
Young players like Spičanović also performed for Baran.
In the end, plus 16 for Buducnost – 105:89.
Maggie led the "blues" with 31 points, while Mason shone on the other side with 37 points.