It's been a tough season for the Boston Celtics thus far. But against the Denver Nuggets on Sunday, the Brad Stevens-coached squad showed its mettle with a comeback win. Guard Marcus Smart flocked to Twitter to express his thoughts on their victory.

Smart commented on Denver's high altitude which causes some trouble to visiting teams. But according to him, the only light on Sunday was their bodies as they felt as energetic as ever. And it showed in their performance, capping off a 31-3 run to end the game.

It was a surprise win, especially after a subpar first quarter where the Nuggets outscored them 27-16. But little by little, the Celtics climbed back thanks to the efforts of Jayson Tatum who had 28 points and Jaylen Brown who had 20.

“We just needed something to get us going,” Stevens said after his Celtics won for the fifth time in six games, per the Associated Press via ESPN. “You know, I thought we were close to going the other way there when it was 76-62.”

The Nuggets entered the game against the Celtics on an eight-game winning streak. Their play has raised the eyebrows of tons of analysts and fans, with a chunk of them placing Nikola Jokic on top of the MVP ladder.

The Celtics, meanwhile, haven't been performing up to par but have been showing signs of strength over the last few games. They're usually on top of the Eastern Conference standings but this season, they've been jumping around mid-tier status.

Hopefully, this win over one of the West's elites can spark something new in the Celtics.