Onyeka Okongwu tipped in a missed shot with 6.1 seconds left as the Atlanta Hawks overcame a 15-point, second-half deficit to beat the Boston Celtics 117-116 in their NBA Cup opener.

The Atlanta Hawks had their biggest win of the season as they knocked off the world champions Boston Celtics with a 117-116 win. It was the first game of the Emirates NBA Cup for both teams. It was a huge win for the Hawks,

Coming into Tuesday night’s NBA Cup contest, the Hawks were riding a two-game losing streak with a 4-7 record, and the last time they played the Celtics, they lost by 30 points to a Boston team without Jaylen Brown.

The Atlanta Hawks, who were blown out by the Celtics at home last Monday night, walked into Boston as 16 point underdogs and without their superstar point guard

The Hawks are coming off Saturday's 125-113 home loss to the Bulls, which came one night after Atlanta dropped a 122-121 decision on the road against the Detroit Pistons. The Bulls outscored the Hawks 65-43 in the second half, and 35-15 in the fourth quarter.

Jaylen Brown went for 37 points, but the Boston Celtics still fell to the Atlanta Hawks 117-116 to open the NBA Cup.

On Tuesday night, Boston Celtics head coach Joe Mazzulla walked into his pregame press conference with a sweatshirt that featured the word “MINDSET” in a large, bold font. He donned the same sweatshirt after the Celtics were stunned by the shorthanded Atlanta Hawks,

Jayson Tatum finished with 20 points, six rebounds, eight assists, one steal and two blocks while shooting 5/16 from the field and 2/9 from the three-point range in 37 minutes. Many NBA fans reacted to his performance.