Here is what the the BBC Scotland Sport's reporter at the game ad to say about today's Game'
By Kenny Crawford
BBC Sport Scotland
- Dons and United now level on 31 points
- Adam Rooney up to 17 goals this season
- Goalkeeping error by Radoslaw Cierzniak
- Aberdeen won five of last six in league
On-song Aberdeen registered their third consecutive Tannadice win, beating Dundee United comfortably to go level with them on Premiership points.
Adam Rooney increased his season's goal tally to 17, pouncing on Radoslaw Cierzniak's error for the first before a straightforward second soon after.
United's best chance of an exciting first-half fell to Chris Erskine, who was foiled by Dons 'keeper Scott Brown.
But the hosts failed to threaten in a less entertaining second half.
That will frustrate Tangerines manager Jackie McNamara, given the 3-0 beating they administered to Aberdeen on the opening day of the campaign.
Losing at home for the first time since May - a defeat which was also inflicted by Aberdeen - also means McNamara's Tannadice could not be described as a fortress on this occasion.
The August loss clearly still rankled the Dons, who were eager to right that wrong and make it five wins from their last six in the Premiership.
Aberdeen have won five of their last six games in the Scottish Premiership
Derek McInnes's men quickly looked to replace those memories and almost took the lead bizarrely when Niall McGinn's 20-yard shot landed on the top of the crossbar via a deflection off United's John Rankin.
Tell-tale signs of United settling were apparent, with the likes of a nice reverse pass by Erskine to Stuart Armstrong, but accurate final balls did not follow.
Instead, a rare Cierzniak mistake did. The Polish goalkeeper inexplicably failed to gather a weak David Goodwillie header from McGinn's free-kick, letting it come back off his chest and onto a plate for Irishman Rooney to convert for Aberdeen.
Paul Paton fizzed a 25-yard strike narrowly over to suggest a quick United reply was imminent, and that possibility seemed even more likely when Armstrong helped Erskine beat the offside trap, only for the former Partick Thistle midfielder to see his low shot saved by the legs of Brown.
Cierzniak was called upon to deny Peter Pawlett from an angle but the 'keeper would be beaten again shortly after.
A lovely chipped cross by Jonny Hayes found Andrew Considine at the back post and his centre left Rooney with another simple finish to double Aberdeen's advantage.
Almost immediately, McGinn found another Considine delivery from the left fall to him at the other side of the box, and only the inside of the near-post prevented the Dons making it three by half-time.
On the hour-mark, the former Dundee United forward Goodwillie had his best chance to score against his old employers, shooting over from 10 yards at the Shed End.
And, with a lack of any real United attacking, Aberdeen's Pawlett was played through, but his low effort was turned over the bar by the onrushing Cierzniak.