(Yoan Gouffran 68, Loic Remy 89)
Chelsea came looking to land the knockout blow at St James' Park on Saturday for a win that would have sent them to the top of the table, temporarily at least.
At the final whistle, however, the joy was in black and white.
Newcastle did what few deemed likely, clinching a convincing 2-0 win that will rock the Blues' title credentials at the very foundation.
The grit at the core of vintage Chelsea was missing.
The uncertainty that dogged their play from the first minute to the last will surely set off the alarm bells at Stamford Bridge.
The Magpies took the fight to the Blues, executing their counter-attacking plan to perfection to end up as deserving winners.
Chelsea manager Jose Mourinho thought so as well.
Defeat on Newcastle's turf is becoming a bad habit for the Portuguese, who has yet to taste a league victory there.