Aberdeen were handed a Pittodrie hammering by Celtic, losing 4-0 to the Glasgow side.
The Dons never got near their opponents all day and were 2-0 down within 15 minutes. The belief was gone from there before another two Hoops goals compounded the misery.
Here are three things we learned.
Makeshift midfield handed a reality check
Defenders Zak Vyner and Greg Leigh were brilliant in midfield against Motherwell, but against a ruthless Celtic side, they were found out in serious fashion.
The experience of Scott Brown and Callum McGregor was too much for them whilst Jon Gallagher struggled to support Sam Cosgrove in attack.
It was a bit of a mismatch and it played a part in Aberdeen’s downfall.
Fan pressure build on McInnes
The Red Army voiced their discontent throughout this match with jeers and whistles as the pressure from the stands builds on McInnes.
After a 5-0 hammering at the hands of Rangers only a few weeks ago, the Dons faithful were hoping to challenge the Hoops. It was anything but a challenge for the away side as they coasted to victory.
Already fans were split on McInnes after a frustrating start to the season has lead them to fifth position. Another hammering in league action won’t have helped his cause with some supporters.
Aberdeen can’t buy a Celtic result at Pittodrie
It’s now seven straight Pittodrie victories for Celtic. This run started back in 2016 and it showed no sign of stopping in this latest encounter.
Defeats come with the territory of playing either of Glasgow’s big two, but the manner of defeat is concerning. They didn’t lay a glove on Celtic all afternoon, with a man for man approach not working.
McInnes will head back to the drawing board now as he looks to regroup his players for the Wednesday night clash with Hamilton.