Finch's blistering 172 against Zimbabwe propelled him to the 900-point mark.
The batsman who scored a match-winning 91 to help Pakistan complete a record chase win against Australia in the final of tri-series T20I in Zimbabwe, added that he did not regret missing out on the century in the final as he was looking to finish the match early.
India's World Cup victor Roger Binny, Pakistani pacer Umar Gul and the Bangladeshi pair of Soumya Sarkar and Enamul Haque Jrare other four players who have been dismissed on diamond ducks, but they had made their global debuts in some other format previously. And it's safe to say Pakistan opener Fakhar Zaman is made of the same material that made Gilchirst what he was. His sequence in Zimbabwe read 61, 6, 47, 73 (his career-best score before the final) and 91.
Pakistan squad: Sarfraz Ahmed (c), Fakhar Zaman, Mohammad Hafeez, Shoaib Malik, Asif Ali, Hussain Talat, Haris Sohail, Shadab Khan, Mohammad Nawaz, Faheem Ashraf, Hasan Ali, Mohammad Amir, Usman Khan Shinwari, Shaheen Shah Afridi, Sahibzada Farhan.
Finch, the new Australia T20I captain, had a wonderful Tri-series tournament in Zimbabwe.
For Pakistan, a 45-run victory over Australia in their last league match on Thursday 5 July will act as a morale booster ahead of the final.
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The others who garnered career-best rankings following the two series were Jason Roy (No. 15 with 641 points), Jos Buttler (No. 17 with 614 points) and Zimbabwe's Solomon Mire, who rose a staggering 202 spots to 25th place on the table.
D'Arcy Short, Finch's opening partner, entered the top 10 rankings for the first time.
This is Pakistan's ninth successive T20 series win and has helped the team retain their top position in the T20 ranking.
Pakistan cricket team thrashed the Australian side by six wickets in the final of the T20I tri-series here on Sunday.
Farhan was stumped by Australian wicketkeeper Alex Carey off Glenn Maxwell in the first over of Pakistan's chase, off a wide delivery as he had ventured out of the crease to get his first global runs.
The top three sides are now separated by ten points, while three points separate fourth-ranked England and seventh-ranked West Indies. The remaining six sides will qualify from the 14-team Qualifier 2019.