The pacer gained seven spots last week to be ranked joint-fifth with Adam Zampa and this week overtook Wanindu Hasaranga, Adil Rashid and Varun Chakravarthy apart from Hosein. It is the first time Duffy has held the No.1 bowler ranking in any format and the right-armer is the first New Zealander to hold the premier bowling ranking in men's T20I cricket since Ish Sodhi in 2018.