De'Andre Hunter exited in the first quarter with a right hip flexor strain and will be re-evaluated in one week, while John Collins will miss at least two weeks due to a left ankle sprain sustained on a dunk attempt just before halftime.
Tests on Collins' ankle on Thursday confirmed the severity of the sprain, according to The Athletic’s Shams Charania.
Hunter is third on the Hawks in scoring at 14.9 points per game, while Collins ranks fourth at 12.3 points per contest and second in rebounds at 7.5 per game.
While Atlanta’s lineup took a hit with the injuries to Hunter and Collins, reinforcements are on the way with Bogdan Bogdanovic expected to make his season debut soon, following his knee surgery in the offseason.
Bogdanovic averaged 15.1 points last season and his 169 made three-pointers were second on Atlanta behind Trae Young.
In addition to the imminent return of Bogdanovic, the Hawks also may have caught a break with the timing of the injuries to Hunter and Collins. Atlanta has the easiest strength of schedule this month, with its 14 December opponents sporting a .422 combined winning percentage.
Wednesday’s win snapped a season-worst three-game losing streak for Atlanta, who own a one-game lead over the Washington Wizards for first place in the Southeast Division.
Trae Young relished his starring role as the Atlanta Hawks beat the New York Knicks 103-89 to secure progression to the Eastern Conference semi-finals on Wednesday.
Young had been targeted by fans throughout the first-round playoff series, even being spat on by one of them during Game 2.
He was given a frosty reception again at Madison Square Garden this time around, with certain chants aimed at the 22-year-old, but Young had the last laugh.
In the final minute as Knicks fans rose to give their team one last ovation with Hawks cruising to a comfortable win that ultimately eliminated the hosts, Young sunk a three-pointer before bowing at the centre of the court and waving goodbye to the crowd.
The cheers quickly turned back to jeers.
"I know where we are. I know it's a bunch of shows around this city," Young said afterwards. "And I know what they do when the show is over.
"It feels good. Like I said since the beginning of the season, I feel like I've worked my whole life for this moment, to play in the playoffs on the biggest stage.
"I put in a lot of work. A lot of the guys who have been here have done the same. It feels good to win it. It feels good to win the series. Now we get to focus on the second round."
Young played a leading role for the Hawks, his 36 points and nine assists both highs for the match.
On top of that, his consistency throughout the series has undoubtedly been important for the Hawks, with Young averaging 29.2 points and 9.8 assists each game, while also getting the winning points in Game 1.
He ends the series with 146 points, which is the seventh-best playoff hall in the NBA since the 1976-77 ABA-NBA merger, and his team-mate John Collins suggested the Knicks crowd chose the wrong man to pick on.
"Trae loves this stuff," he said. "He's in the gym grinding. You see him pandering and playing to the crowd.
"Certain guys get motivated and find their reason and extra motivation to play based off the crowd. The crowd does give you energy.
"Trae loves to use that negative energy and use it as fuel for him. For whatever fans who want to keep antagonising that man, please go right ahead. It's not going to bother him, and we've got his back as well."
The Hawks will face top seeds Philadelphia 76ers in the next round.
Going 11-for-20 from the floor, Embiid scored 21 of his 32 points in the first half, including a fadeaway three on the buzzer to give the Sixers a 58-53 lead at the interval.
Luka Doncic put up a double-double of 17 points and 10 assists but was held to 25 per cent from the floor and 20 per cent from the perimeter, in a poor shooting night.
At 43-26, the Sixers are now three games behind the Miami Heat, the Eastern Conference leaders, while the Mavericks are fifth in the Western Conference at 43-27.
Westbrook lifts Lakers to overtime win in Toronto
Russell Westbrook's three-pointer at the end of regulation propelled the Los Angeles Lakers to a 128-123 road win over the Toronto Raptors in overtime.
With 10.3 seconds remaining, the much-maligned Westbrook forced a turnover off a Raptors inbound before draining a contested triple from the wing, to tie the game at 116-116.
Both sides remain firmly placed in play-in calculations, though, with the Lakers ninth in the Western Conference at 30-40, while the Raptors are seventh in the East on 39-31.
Short-handed Hawks snap Memphis win streak
Without their two scoring leaders, the Atlanta Hawks secured an important win at home to the Memphis Grizzlies, emerging 120-105 victors.
In John Collins and Trae Young's absence, Bogdan Bogdanovic came up big with a season-high 30 points, while Delon Wright and Clint Capela also added 18 each.
Despite 29 points from Ja Morant on 11-for-23 shooting, the Grizzlies had a four-game win streak snapped, but still hold the NBA's second best record at 48-23.
Going 11-for-20 from the floor, Embiid scored 21 of his 32 points in the first half, including a fadeaway three on the buzzer to give the Sixers a 58-53 lead at the interval.
Luka Doncic put up a double-double of 17 points and 10 assists but was held to 25 per cent from the floor and 20 per cent from the perimeter, in a poor shooting night.
At 43-26, the Sixers are now three games behind the Miami Heat, the Eastern Conference leaders, while the Mavericks are fifth in the Western Conference at 43-27.
Westbrook lifts Lakers to overtime win in Toronto
Russell Westbrook's three-pointer at the end of regulation propelled the Los Angeles Lakers to a 128-123 road win over the Toronto Raptors in overtime.
With 10.3 seconds remaining, the much-maligned Westbrook forced a turnover off a Raptors inbound before draining a contested triple from the wing, to tie the game at 116-116.
Both sides remain firmly placed in play-in calculations, though, with the Lakers ninth in the Western Conference at 30-40, while the Raptors are seventh in the East on 39-31.
Short-handed Hawks snap Memphis win streak
Without their two scoring leaders, the Atlanta Hawks secured an important win at home to the Memphis Grizzlies, emerging 120-105 victors.
In John Collins and Trae Young's absence, Bogdan Bogdanovic came up big with a season-high 30 points, while Delon Wright and Clint Capela also added 18 each.
Despite 29 points from Ja Morant on 11-for-23 shooting, the Grizzlies had a four-game win streak snapped, but still hold the NBA's second best record at 48-23.