Brooklyn Nets star Kyrie Irving suffered a nasty-looking ankle injury after landing on Milwaukee Bucks star Giannis Antetokounmpo’s foot. Irving went down to the court in pain and stayed down as play momentarily continued.

Here’s video of the play:

Irving wound up limping off the court and into the locker room. He has been ruled out for the remainder of Game 4 with a sprained ankle.

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The Nets are already without superstar James Harden due to a hamstring injury, and it’s unclear when he’ll be back. Losing Irving as well would be a brutal blow for Brooklyn’s championship hopes.

It looked like the Nets were going to cruise through the Bucks even after Harden got hurt at the very start of Game 1. Brooklyn dominated the first two games of the series and then took a late lead in Game 3 after erasing a 21-point first-quarter deficit.

But Milwaukee made the big plays down the stretch of Game 3, earning an ugly 86-83 victory to keep the series interesting. The Bucks got down by 11 points early in Game 4, but they came storming back to take the lead at halftime.

With Harden already out and Irving hurting as well, Brooklyn is now in a rather precarious position. Durant didn’t play well in the first half, so he’s going to have to step up.