Fakhar earned this achievement against Zimbabwe in the fifth and final ODI on Sunday when he came to bat, needing just 20 runs to secure the milestone. The 18 innings taken by him to reach the mark broke the record previously held by the likes of Sir Viv Richards and Babar Azam (21 innings).
Zaman finished with 515 runs in the series that included a century and also Pakistan's first ever double hundred in an ODI.
"It was a great team effort to win 5-0 against Zimbabwe", said Ahmed.
Pakistan's opening pair Fakhar Zaman and Imam-ul-Haq also achieved a unique feat in the series by being the first batting pair to score 600 runs in a bilateral series.
After surrendering meekly with the bat in the four previous ODIs, all Zimbabwe wanted was to bat out 50 overs to give a good account of themselves. Only Virat Kohli, who hit 558 for India in South Africa last winter, has scored more. Fakhar averaged an astounding 257.50 in the series, and he easily shattered the previous record held by Salman Butt who scored 451 runs in a five-match rubber against Bangladesh back in 2007-08.
While Fakhar's batting exploits have been the talk of the series and rightly so, it is easy to forget that his opening partner has had a stellar time as well. Imam, the nephew of batting legend Inzamam, scored his 4th ODI century in 9 innings. This is the most by a Pakistani batsman in an ODI series. He is now the first batsman in history to bring up four centuries in his first 10 matches.
Opener Imam-ul-Haq's good work of making 110 was enriched by Babar Azam in the one down position; he managed a throbbing 106 runs facing just 76 deliveries.
Pakistan went on to win the game by 131 runs as they whitewashed Zimbabwe 5-0.
Prince Masvaure (39) and Murray also got starts before both fell while going for big shots.