Poku Hammer alert! Oklahoma City Thunder rookie Aleksej Pokusevski raised the roof with a filthy poster dunk over Boston Celtics center Robert Williams.

Watch the highlight below:

This finish just goes to show just how much ability and athleticism Pokusevski has in his 7-foot, 190-pound frame. Even with his size and lanky stature, he was still able to impressively get around the defense by knifing his way through two defenders. The hammer, of course, just made it much sweeter, especially with it coming against an elite shot blocker like Robert Williams.

Unfortunately, Pokusevski got hurt and went back to the locker room to have his knee evaluated, but made it back to the Thunder's bench shortly after, per Joe Mussatto of Oklahoman Sports.

Everything seems to be fine with Poku, as he already checked back in the game in the fourth quarter.

The Thunder have committed to giving their younger guys more run to end the season. They have already traded veteran guard George Hill to the Philadelphia 76ers and shut down big man Al Horford for the rest of the campaign.

With that, guys such as Pokusevski should have enough opportunities to get more run and reps to develop their games. If the impressive finish is any indication, it looks like he's getting more comfortable in the NBA.

After not playing for over a month from early February to early March, Pokusevski has played in each of the Thunder's games since March 11th. In eight games prior to Saturday, the Serbian kid is averaging 10.5 points and 7.5 rebounds in 31.2 minutes.