Aberdeen won their 12th consecutive game to maintain their 100% record under Jimmy Thelin by defeating Dundee at Dens Park.
Kevin Nisbet, filling in for injured Premiership top scorer Pape Habib Gueye, put the visitors in front with a precise finish after winger Topi Keskinen exploited a Billy Koumetio error.
Koumetio would again be at fault for Aberdeen's second, prematurely racing out of defence to support an attack, before Mo Sylla was dispossessed by Graeme Shinnie.
The Aberdeen captain fed the speedy Keskinen, who pulled clear of Koumetio to fire in low past Jon McCracken.
The hosts continued to charge forward in numbers despite the deflating double, with Lyall Cameron's arrowed effort forcing a strong stop from Dimitar Mitov.
Dundee did haul themselves back into the tie when Gavin Molloy tripped Simon Murray in the box as the striker looked certain to score. And Murray sent Mitov the wrong way from the spot.
After latching on to a long McCracken punt, Scott Tiffoney jinked around Jack MacKenzie to force an excellent low stop from Mitov just shy of the hour mark.
Dundee showed glimpses of promise in an intense second-half battle, but Aberdeen remained resolute to emerge victorious.