Isaiah Hartenstein had played 12 mostly cosmetic minutes in Game 1 of the Western Conference Finals. By the end of Game 2 he was the Oklahoma City Thunder's primary answer to Victor Wembanyama, a 47-possession assignment that helped the defending champions tie the series 1-1 with a 122-113 win in Oklahoma City on Wednesday night.
Speaking to reporters after the game, Hartenstein traced the shift back to a private conversation with head coach Mark Daigneault the day before.
"He kind of apologized, but it was more like, 'Hey, just be ready. Your number's going to be called more and we're going to try to do something different,'" Hartenstein said. "Mark's a great coach. I trust him. And if you want to play in a team sport, if you want to play on a team like this, you really have to put your ego aside and do what's best for the team."
The German centre finished with eight offensive rebounds and a defensive impact that did not show up cleanly in the box score but flooded the tape. Wembanyama went from 21 paint shots in Game 1 to fewer than 10 in Game 2, with Hartenstein and Chet Holmgren wearing him out on the interior while the Thunder guards swarmed Stephon Castle into nine more turnovers.
Hartenstein refused to single out a specific tactic, framing his job as a basic test of physicality.
"In the first game, they were a little bit more physical than we were. And so, just coming into this game, just wanted to establish that early," he said. "I'm just kind of one of those players that brings physicality to the game. And I think that's just kind of what we needed. But in general, I think everyone just stepped up the physicality. Chet was big in the second half, just being more physical."
Asked specifically what he found effective against the 7-foot-4 Spurs star, Hartenstein offered praise rather than chest-thumping.
"He's a great player. At the end of the day he's a great player. Just coming out there being more physical. Just making sure he doesn't get any easy rim finishes," he said. "He's a great player, so he's going to get to that sometimes. You just have to just make it as hard as possible. I think we just did a better job in general as a team. We can still do stuff a lot better, but I think it's a good step forward."
The veteran reserve has been here before. Daigneault changed the Thunder's starting lineup at points during their championship run last year, moving Hartenstein in and out of the first five, and the same readiness mindset applies now.
"I'm ready to be in any role coach needs me to be in," Hartenstein said. "If you want to play on a great team, if you want to affect winning, you have to really put your ego aside. I mean, it's harder said than done, but I think we have a great culture. Mark does a great job at just communicating. I think that's one of his biggest strengths, and I think one of the biggest things an NBA coach has to know is how to work with the egos of the team. That's something he does better than really any coach I've kind of been a part of. Whatever Mark needs me to do, I'm ready to do. If it's play 5 minutes, play 48 minutes, set a million screens, or whatever he needs me to do."
The series resumes in San Antonio with the Spurs already missing De'Aaron Fox to a high ankle sprain and Dylan Harper exiting Game 2 with a leg injury. With those guard problems mounting, Hartenstein's expanded assignment on Wembanyama is unlikely to shrink any time soon.
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*Originally published on [NBA News Global](https://nbanews.global/article/isaiah-hartenstein-ego-aside-wembanyama-defense-mark-daigneault-game-2-wcf-may-2026). Visit for full coverage.*
