Celtics coach Doc Rivers is a graybeards fan. He said yesterday the Knicks’ offseason signing of antiques “was a very good strategy” and pointed to Jason Kidd as proof.

“He created havoc [in Game 1],” Rivers said. “I don’t know if I can beat Jason in a sprint, but I think I can give him a go. Yet he got steals, no one could go by him. He’s so smart. I use the [Bill] Belichick line all the time. People go to these draft combines and are all excited about what the guy ran in the 40, instead of looking at the film and seeing who got there first with their mind. That’s what Jason did.

“He had two steals that guys 10 times quicker than him would have never got, but he sees it before it happens and he reacts. He’s beating people with his mind right now. He beat us [Saturday], for sure.”