TyTy Washington told The Post he didn’t interview with the Knicks last week at the draft combine, but suspects he will work out for them at their practice facility in Tarrytown. “Most definitely I feel I’m one of the most true point guards coming out of the draft, even though this season I played mostly off the ball,’’ Washington said at the combine. “Before this season, I was mainly a point guard. I played off the ball because that’s what my team needed. They needed me to make baskets and score for us. Cal said me being off the ball was no knock on me.’’