Tanzania's Kilimanjaro Stars are now in the Cecafa semifinals after seeing off Rwanda's Amavubi in a difficult two-goal clash at Lugogo, Kampala.
A goal on either half of the Monday game by Amri Kiemba and John Bocco, respectively were responsible for Rwanda's end in this year's tournament.
Despite the Tanzanians generally looking more mature in play, the Rwandans proved to be more dangerous in attacks, especially in the dying minutes of the game.
Bocco's goal elevates him to the top scorer position this tournament with five goals alongside his fellow countryman, Mrisho Ngassa.
The first game of the tournament's knockout stage started off on a high, with both sides tapping the ball around, but hardly ever managing a significant breakthrough.
An early free-kick for Rwanda, and a first corner for Tanzania both ended fruitless. If there was any rush for a goal either side, it was really never evident in the opening minutes.
Not much of the ball was seen nearer the edge of either goal as most of the balls remained glued within the crowded midfield. Plenty of good passes - often one-twos up and about - but with a closed-in game, it wasn't much.
The Rwandans bossed the ball better through the first quarter of the first half, but whenever the Tanzanians got hold of the ball, they managed to drive the ball forward.
Rwanda 0 Tanzania 2 (Kiemba 34', Bocco 54')
Burundi 0 Zanzibar 0 (Game in play)