Quinn Cook had 11 assists many on lob passes inside to Plumlee and Duke shot 58.7 percent (27 of 46), just off its season-best 60.8 percent against Florida State.
Steven Fletcher flicked on Jensen's long clearance and Paterson - who had earlier troubled the Pompey backline with a jinking run and shot that James saved - fired a brilliant lob over the keeper and under the bar.