On 3 July 2018, Finch scored a blistering knock of 172 during the third T20I of Zimbabwe tri-series against Zimbabwe and became the second Australian to score 2 T20I centuries after Glenn Maxwell. His score stands as the highest individual score of T20Is of all time and also the second highest individual score in across all forms of T20s, beating his own previous record of 156 and also the highest individual T20I score by an opener. His knock of 172 is also the highest individual score set by a captain in a T20I innings which was previously held by Shane Watson and Finch also went onto become the only batsman to score 2 T20I 150+ scores in T20I cricket. Finch also created a new record for facing the most number of balls by a player in a T20I innings (77) and also accumulated the highest percentage of runs by a single batsman in a team total in any T20 match with 75. 1%. He hit 10 sixes in the innings during a world record opening stand of 223 in T20I cricket with D'Arcy Short which was ended in the final over. The partnership of 223 between Finch and Short is also the highest partnership for any wicket in a T20I and also marked the first ever instance of a 200+ run-stand in a T20I match for any wicket. The partnership was also the second highest ever partnership for any wicket in any form of T20, just behind 229 runs set by Virat Kohli and AB de Villiers. Australia finally won the match by 100 runs, which is their biggest winning margin in T20Is. During the match he also shattered the record of Herschelle Gibbs for scoring most number of fours by a player in a completed T20I innings with 16.