A talent evaluator who watched Heat first-rounder Daequan Cook in summer league said he must improve his defense, footwork and balance on his shot and doubts he'll contribute a lot as a rookie.

But Pat Riley said Cook has made ''great strides this summer. Whether or not he cracks the rotation will be up to him.''

Cook, incidentally, likens his game to Boston's Ray Allen and said there's no reason he can't be as good.