Niall McGinn was on target as Aberdeen extended their unbeaten run to 11 games after a 1-1 draw with Dundee United.
John Rankin's 22nd-minute goal was cancelled out eight minutes into the second half by Aberdeen striker Niall McGinn, who netted in Northern Ireland's midweek draw in Portugal on the occasion of Cristiano Ronaldo's 100th cap.
After 88 minutes, United should have sealed victory but Rankin fired wide across goal with a wasteful ball when he should have shot himself or passed to Johnny Russell.
The teams were made to wait an additional 20 minutes as kick-off was delayed due to a road closure and there was a circumspect start.
Russell was proving a handful for Aberdeen and his run set up the opening goal. He beat Mark Reynolds on the left before firing a shot Jamie Langfield could only parry back into the centre of the goal from where Rankin found the bottom corner with a scuffed shot.
Armstrong was also lively and he skipped by Isaac Osbourne on the byline before crossing along the six-yard line, but behind Russell.
Aberdeen came within inches of an equaliser when McGinn, buoyed by his strike in Porto, pulled the ball back for Scott Vernon, whose snap-shot was turned around the post by Radoslaw Cierzniak.
United had four corners in quick succession early in the second half, two of them delayed when objects were thrown from the away end on to the pitch.
Ahead of the fourth, referee Iain Brines spoke to a policeman to report the incident, before Fraser's set-piece was headed on to the back post where McGinn swept the ball in.
Once again it was Russell who tried to respond from the hosts, running at the Dons defence before drilling an effort from 20 yards which Langfield saved well and Rankin's late indecision proved costly as United's wait for a win continued.