ATLANTA - Another day, another shocking loss by the Cleveland Cavaliers to the upstart Atlanta Hawks on Sunday.

Even so, Cavs captain LeBron James isn't too concerned with the upcoming playoffs.

"Obviously, the last 10 games we've been 5-5," he said. "We had some good moments and we had some not-so-good moments today.

"The best thing for our team is we want to go down the stretch, be healthy and put a game plan together."

Paul Millsap scored 22 points and the Hawks took advantage of Cleveland's fourth-quarter collapse to overcome a 26-point deficit and stun the Cavaliers 126-125

Kyrie Irving scored 45 points for Cleveland, and James had a triple-double with 32 points, 16 rebounds and 10 assists before the four-time MVP fouled out in overtime.

Tim Hardaway Jr added 21 points to help Atlanta beat Cleveland for the second time in three days.

The defending champion Cavaliers dropped into a tie with Boston atop the Eastern Conference.

Both teams have two regular-season games remaining. If the Cavs and Celtics finish with the same record, Cleveland will get the top seed for winning the season series.

The Hawks wiped out a 26-point deficit in the fourth quarter, outscoring the Cavs 44-18 in the period and forcing overtime on Millsap's baseline jumper at the buzzer.

Millsap hit a 3 with 1:12 left in overtime to make it 118-116 for Atlanta's first lead of the game. Mike Muscala's 3-pointer from the right corner put the Hawks back up by one with 35 seconds left.

The Hawks seized control in the final 21 seconds after Kent Bazemore stole an inbound pass from Kevin Love for a layup and Hardaway hit three free throws.

Atlanta looked disinterested for three quarters, so coach Mike Budenholzer went with two starters, Millsap and Hardaway, and several reserves the rest of the way.

"Give them all the credit," Millsap said. "That's what got us back in the game."

James committed a turnover by failing to inbound the ball with 18 seconds remaining and fouled Millsap on a 3 attempt 10 seconds later. Millsap hit all three foul shots to make it 111-109 with 8 seconds to go.

Irving scored 15 points in the first quarter. His 3 at the 7:22 mark gave Cleveland its first double-digit lead. The Cavs were up 38-21 entering the second with Irving dribbling and shooting at his leisure against the Hawks' sloppy defense.

"We became the team that was becoming attacked rather than us attacking," Irving said. "Once that flip-flops, the game started changing and the momentum shifted."

Associated Press