Milwaukee Bucks star Giannis Antetokounmpo left their matchup with the Cleveland Cavaliers early on Monday night due to a groin injury.

Antetokounmpo was trying to make a move on Jarrett Allen in the post late in the second quarter at Rocket Arena, but he fell back awkwardly down to the court after missing a layup. Antetokounmpo immediately reached down toward his groin, clearly in pain, as play went the other way.

He got up and stayed in the game, but wasn’t moving right as he jogged down to the other end. Once play stopped next, he limped immediately off the floor to the locker room.

Antetokounmpo did not return to the game, and was quickly ruled out at halftime with what the Bucks called a left groin strain. Further specifics are not yet known.

Antetokounmpo had 14 points and five rebounds when he went down, which led the Bucks in the first half. They entered the break down by two. The 30-year-old entered Monday’s game averaging 32.6 points per contest, trailing only Los Angeles Lakers star Luka Dončić in the league. He’s also averaging 11.3 rebounds and 7.1 assists per night.

The Bucks carried an 8-6 record into Monday’s game in Cleveland.

This post will be updated with more information shortly.