One Celtics fan's reaction said it all after Luka Doncic buzzer-beater

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Sometimes all you need is a look.

Thanks to a viral video taken just moments after Luka Doncic put a dagger in the Celtics via his buzzer-beating three-pointer - handing the Mavericks a 107-104 win over the C's Saturday night - no words were needed to uncover the feelings of all things green.

A good part of the unfortunate introspection stemmed from the helplessness left by Doncic. As he did in a previous buzzer-beater against the C's, he reminded us all that this is a truly generational player.

Despite being double-teamed for a good portion of the game - (which included the Celtics coming back from a 19-point first-half deficit) - the 22-year-old netted 33 points in 35 minutes.

But that was just part of the frustration.

Leading up to the Doncic shot was a colossal mistake by either Marcus Smart, Celtic coach Ime Udoka, or both.

Instead of potentially getting the ball back with six seconds left, Smart fouled Doncic with 11.4 seconds remaining. That reset the shot clock and cemented the Mavericks' opportunity to play out the rest of regulation.

After the loss, it was Udoka who took the blame.

"It was not supposed to be a foul," the coach said. "Feel the guys asked me coming out of timeout, I let them know. Just a mistake there."

He added, "That’s something we got to let everybody know and make sure they know. Obviously, with five, six-second differential, we want that last shot. I gotta communicate that to everybody so everybody knows."

The final two minutes were true to form for both Smart and Doncic.

For the Celtics guard, they included a clutch three-pointer with 2:12 left that gave his team its first lead of the game. Yet, with 30 seconds remaining, Smart threw up a wild shot - driving to draw a foul from Kristaps Porzingis - finishing off what would be the visitors' last possession.

Doncic? This is what he does.

"I think everyone knew the ball was going to 77 and he delivered," said Mavericks coach Jason Kidd.

"I think I guarded it well," said Celtics guard Josh Richardson. "He's hit game-winners quite a few times. It's tough, but you've got to give credit where it's due. Good defense. Better offense."

Featured Image Photo Credit: USA Today Sports