The Denver Nuggets have beaten the reigning NBA champions and the reigning Eastern Conference champions - albeit a Cleveland team that's a shell of itself - in their best start in decades.
Now another test - facing one of the heavy favorites to reach the NBA Finals in June.
The Boston Celtics are in town to play the Nuggets on Monday night, fresh off a disappointing loss at Indiana on Saturday night, and they're a little sore about it. Boston held a late lead but a missed layup by Kyrie Irving opened the door for the Pacers, and Victor Oladipo won it with a 3-pointer.