NBA: Playoffs-Toronto Raptors at Boston Celtics

Celtics guard Kemba Walker drives against Toronto Raptors guard Fred VanVleet during the second half of Wednesday night's playoff game. 

The NBA ruled Thursday that the game officials missed a critical call at the end of regulation of the Boston Celtics-Toronto Raptors Game 6 on Wednesday night.

In its Last Two Minute Report, the league ruled that an incorrect no call was made when Boston's Kemba Walker drove for the go-ahead score with 4.4 seconds remaining in the fourth quarter with the score tied at 98.

OG Anunoby should have been called for a shooting foul, sending Walker to the line for the potential go-ahead free throws.

"Anunoby (TOR) makes contact to Walker's (BOS) arm during his shooting motion that affects his driving shot attempt," the league wrote.

A second incorrect no call also benefited the Raptors. The league ruled Toronto guard Norman Powell should have been whistled for traveling with 1:35 remaining in the first overtime. Instead, Powell was fouled and made two free throws to give Toronto a 106-104 lead.

The game went into double overtime where the Raptors won it to force Game 7 of the Eastern Conference semifinals best-of-seven series on Friday night.