A Benni McCarthy free kick went straight in the net and that was enough for Rovers to pas through to the next round.
And Big Sam was quick to praise his striker.
He said: "Benni meant to do that, we practice it in training all the time.
"We always practice to hit the target as the goalkeeper can't do anything about it, as there's a cluster of players there that may get a touch.
"So if someone gets a touch it can go in and if someone doesn't the goalkeeper is left stranded and it goes in the back of the net.
"It's the quality of the ball from that angle to get it on target that was the difference in quality between the teams.
"That outstanding free-kick and Jason Brown's absolutely superb penalty save from a very well-taken penalty was the quality that won us the game.
"Overall I'm delighted. It was a tough match like we expected and we came through with no injury problems and gave a lot of players some really good football to catch up with match fitness.
"With a squad of our size it's important to give players some high-quality time on the pitch."