Hartenstein dealing with Achilles issue

Mitchell Robinson is still dealing with the knee soreness that caused him to miss eight games earlier this month, and now Knicks backup center Isaiah Hartenstein has revealed that he also has been receiving treatment regularly for an inflamed Achilles since the summer.

Hartenstein, also one of several players suffering from flu-like symptoms on the team’s just-completed 3-2 western road trip, averaged 3.8 points and 5.6 rebounds over 18.4 minutes per game.

“Especially on the trip it was a little harder, playing with flu. Still not really healthy as I should be with my Achilles stuff. So just trying to get back into it,” Hartenstein said after practice Wednesday. “I knew it wasn’t the best trip of mine. But I was just trying to give it everything I had with the amount of ability I had and my Achilles being like 80 percent the whole season.”

Robinson played for the first time since Nov. 4 on Sunday in Phoenix, but he left the game at Oklahoma City the next night in the second half with recurrent right knee soreness.

Robinson participated in “most” of practice Wednesday, coach Tom Thibodeau said, which means the center potentially could be available Friday against Portland at the Garden.

Thibodeau has utilized a three-center rotation during the past two games, with second-year big man Jericho Sims also earning minutes.

Hartenstein admitted the Achilles situation has affected “how I normally play, especially on defense” and that he’s been trying to adapt his game to fit the Knicks’ style.

“I think everyone has been contributing. Jericho is definitely an NBA player, and what he brought to the team especially, maybe when I wasn’t at full capacity. I think he did a good job of holding it down. … And Mitch has been doing a good job, too,” Hartenstein said. “For me it’s adjusting to a different role where it’s playing more like them, I guess. Not more of what I’m used to. That’s been a little more difficult.”

Thibodeau said

(groin) “did a little” in practice and Rose (toe) “did most of it, as well,” and will “see how they feel Friday.”