Dumbarton kicked off against an Aberdeen side adopting a 3-5-2 formation for the evening. Not surprisingly Aberdeen took the initiative and won the first corner of the match in the 3rd minute. Tosh was the first to have a shot at goal three minutes later, but his effort drifted over the bar. Zdrilic went close in the 8th minute when he headed wide with Grindlay scrambling across his goal. Dumbarton then showed that they weren't here to make up the numbers when Boyle hit a powerful drive inches wide with 10 minutes on the clock.
A minute later Sheerin hit a low drive, which also hit the woodwork before skidding to safety. Tosh once again tested the keeper on the half hour mark, but Grindlay clutched the ball safely as Zdrilic waited to pounce on any spill. The visitors were cruelly denied an equaliser in the 32nd minute when Bradley once more found the woodwork following a well-worked free kick. Seconds later Donald headed inches over as the Dons lead began to look fragile.
Aberdeen made sure of their progression in the 49th minute when Zdrilic turned provider setting up Leigh Hinds to make it 3-0. To their credit Dumbarton never let their heads go down and kept a positive attitude in a bid to entertain the 3,944 fans. With the game won, Dons boss Steve Paterson introduced Deloumeaux and Muirhead in place of Heikkinen and McQuilken.
The Dons continued to carve out half chances with little conviction, but Dumbarton went closest in the 75th minute when Dillon headed a Russell cross wide. The visitors did grab a goal four minutes later as poor defending allowed Obidile through and the striker calmly buried the ball beyond Preece. Dumbarton pressed for a second, but Aberdeen kept them at bay without really threatening to add to their own tally.