Williamson, who returned from paternity leave this month, hit a match-winning century in the opening Test against Pakistan to help New Zealand win by 101 runs at Mount Maunganui on Wednesday
New Zealand captain Kane Williamson enters the New Year as the top-ranked Test batsman after leapfrogging Australia's Steve Smith and India skipper Virat Kohli in the latest official rankings issued on Thursday.
Williamson, who returned from paternity leave this month, hit a match-winning century in the opening test against Pakistan to help New Zealand win by 101 runs at Mount Maunganui on Wednesday.
Smith is in the middle of a rare slump in form and dropped behind Kohli after registering four single-digit scores at the halfway stage of the ongoing four-test series against India.
Kohli, who topscored for India in their eight-wicket thrashing by Australia in the series opener in Adelaide, has returned home for the birth of his first child.
India's stand-in skipper, Ajinkya Rahane, jumped to number six after his stellar hundred in the second test inspired the tourists to a series-levelling victory in Melbourne.
💬 "It's about trying to do as much as you can for the team. If you can contribute as much as you can and it can be reflected on the rankings, that's really cool."— ICC (@ICC) December 31, 2020
📽️ WATCH: The new World No.1 in Tests reacts to the latest ICC Rankings update 🙌 pic.twitter.com/qIAZTrPdTS
Australia's Pat Cummins remains the top-ranked test bowler, while compatriot Mitchell Starc jumped two places to enter the top five.