The rookie shooting guard, who was a first-round Draft pick earlier this year, added 16 points during the 103-102 pre-season win over the Boston Celtics.
The head coach told reporters: "I look at everything. I thought he was poised in terms of his shot selection and I thought early on he was anxious and trying a little too hard.
"I told him he needed to calm down a little bit and I thought he did. In the second half he was fabulous in terms of how he played.
"You know defensively he's tough. He gives off that defensive effort each time down the floor. So its kind of nice to see him moving around because he hadn't had a lot of camp time."
The Knicks play the Toronto Raptors tomorrow.