Giannis Antetokounmpo and Khris Middleton finally are getting a little more help, while Kevin Durant keeps seeing his superstar cohorts get hurt.

And now a second-round playoff series that once looked like a Brooklyn Nets runaway suddenly is up for grabs.

Antetokounmpo scored 34 points and the Bucks rolled to a 107-96 Game 4 victory Sunday to tie the series, while the Nets, lost Kyrie Irving to a sprained right ankle.

The Bucks erased a 2-0 deficit by winning two straight in Milwaukee. Game 5 is Tuesday night at Brooklyn.

“We’re very happy, but we’ve got to keep getting better, keep playing together and hopefully we can go into Brooklyn and take one,” Antetokounmpo said.

Brooklyn’s immediate concern is the health of its superstar trio.

Irving was hurt midway through the second quarter and didn’t return. The Nets already are missing nine-time All-Star and 2018 MVP James Harden, who hasn’t played since the opening minute of Game 1 due to right hamstring tightness.

That puts even more pressure on Durant, who has carried the Nets this series and provided 28 points and 13 rebounds Sunday. The only other Net in double figures was Irving, who had 11 points before leaving.

Nets coach Steve Nash said X-rays taken on Irving’s ankle were negative and that the seven-time All-Star’s status for Game 5 is uncertain at this point.

“We’ll have to see how it goes,” Nash said. “We’ll cross our fingers.”

After Irving made a basket in the paint to cut the Bucks’ lead to 44-40 midway through the second quarter, his left leg hit the right leg of Antetokounmpo on his way down. Irving landed awkwardly, his ankle rolled and he clutched at it as play briefly continued on the other end of the floor.

When play stopped due to a change of possession, team officials went to check on Irving, who appeared in pain on the floor before walking to the locker room. The Nets announced at halftime that Irving wouldn’t return.

The Bucks already had taken the lead for good even before Irving’s injury.

They got more balance Sunday after eking out an 86-83 victory in Game 3, when Middleton and Antetokounmpo combined for 68 points, 79% of the Bucks’ scoring output. That marked the highest percentage of a team’s points that a duo had combined to score in any NBA playoff game ever.

Milwaukee shot 16 of 47 from 3-point range Sunday after going 20 of 88 from beyond the arc in the first three games of this series. ... Guard Pat Connaughton left in the third quarter with a cut near his left eye that caused him to bleed, but he later returned to the game.