Chet struggles against guys like Turner. He isnt used to someone who is basically his size but that also moves well. Offensively, Chet can't post him up, he can't go by him, and he can't shoot over him. The things he does well offensively he can't do against Turner. As he gets more experience he will develop more moves and learn what to do but he isnt there yet. Defensively Turner also neutralizes him some because Chet has to stay on him and he gets pulled out of the paint. If he us too far away Turner will shoot a 3 and if he too close Turner will go by him or pass around him. Turner basically eliminates Chet's best defensive attributes by pulling him out of the post.
Chet has played less than 150 games in his career, 114 regular season and 27 playoff. He just hasn't learned enough yet to be effective against someone like Turner. He is immensely talented so I wouldn't be surprised if his talent sparks a big game or 2, but I would be surprised ifnhe has a good series overall. I expect more games like game 1