After tonight’s matchup between the Oklahoma City Thunder and the Boston Celtics, an undeniable truth has been revealed.

The Celtics are old.

In a game pitting two teams that are currently heading in opposite directions, the visiting Thunder bested the Celtics in the TD Garden, 97-88.

Boston, noted for its stingy defense, was unable to find an effective method for stopping OKC’s talented duo of All-Stars, Kevin Durant and Russell Westbrook, who scored 54 points. The Celtics are a team that has traditionally found to prevent themselves from losing to teams with great individuals, but not tonight.

Durant and Westbrook’s 54 matched the exact point total of Boston’s big four, who were led by Paul Pierce’s 24.

Westbrook has the speed and quickness to make just about any NBA player look old.

While Durant and Westbrook’s theatrics were expected, the Thunder got a momentous lift from shooting guard Thabo Sefolosha. Sefolosha contributed his usual selfless defense, doing his best to lock down Boston sharpshooter Ray Allen – who was only 3-7 from the floor (6 points). But Thabo really became a difference maker due to his offensive effort, a 19-point performance that saw him shoot 7-9 including 2-2 from deep.

Oklahoma City is riding high now, and appearing to be the class of the Western Conference. It’s early, but the young legs and ample playoff experience over the past two seasons could finally pay off for the franchise.

Boston needs a shot of adrenaline. At 4-8, they’ve lost five in a row and are tied for the second-fewest wins in the Atlantic Division, trailing Philadelphia and New York. The Celtics have plenty of games to right their ship, and they will do so (enough to get into the postseason, Cleveland will falter as the season progresses). But their slow beginning and notable losses to playoff bound (New York, Miami, Dallas OKC, Indiana and Chicago) is clearly not a good sign.