Australia captain Aaron Finch led from the front on Tuesday to propel his team to a 100-run victory against Zimbabwe while himself setting a new world record in the 3rd T20 international of the tri-series in Harare.Finch slammed 172 off just 76 balls to set the record for the highest individual score in T20 international cricket, bettering the previous best of 156 which he himself had set five years ago against England in Southampton.Australia posted 229 for 2 after being put into bat and then restricted Zimbabwe for 129 for 9 to qualify for the tri-series final with an unbelievable net run rate of +5.10.Finch’s swashbuckling knock at the top of the order included 16 boundaries and 10 sixes as he forged a 223-run partnership with D’Arcy Short for the opening wicket which is also a new world record.The previous best was the 171-run unbroken stand between New Zealand’s Martin Guptill and Kane Williamson against Pakistan in Hamilton more than two years ago.Australia’s bowlers then stepped up with Andrew Tye leading the tally with 3 wickets while Ashton Agar picked up two. Billy Stanlak, Jhye Richardson, Glenn Maxwell and Marcus Stoinis also got a wicket each.”Yeah, it was nice to get a few in the middle, and break the record. Could’ve started better with the ball, so I thought we could’ve been more polished in the field.”I thought using the spinners was the right move on the surface. Short was good too, but we bowled well in the middle overs. This innings is right up there. They don’t happen very often, so very pleased with it,” man-of-the-match Finch said at the post-match presentation.advertisementEarlier, the 31-year-old fell just 3 runs short of equaling Chris Gayle’s record of the highest individual score in T20 cricket. Gayle had smashed 175 not out playing for the Royal Challengers Bangalore against Pune Warriors India in the Indian Premier League five years ago.”I was captain of the opposition when Gayle got 175, so I remembered that record as well (smiles). The wicket is very good, so we have to bowl well too.”Finch, who recently got married and scored a match-winning 68 not out in the previous match against Pakistan, came into this series after having scored 161 runs in the five-match ODI series against England where he managed one hundred. He then top-scored in the lone T20I with 84 runs but in a losing cause.He had a disappointing run in the Indian Premier League this season with just 134 runs in 10 matches for Kings XI Punjab. But he hit form as soon as he joined the Australian limited-overs squad last month.Finch tore into the Zimbabwe bowling attack on Tuesday with all of the bowlers conceding over 9 runs per over except for Tendai Chisoro, who managed to give away just 19 runs from his four overs.Blessing Muzarabani was the pick of the bowlers for the hosts as he managed to dismiss Short and Finch in the final over of the innings.Australia, who crushed Pakistan in their first game on Monday, top the table with 4 points followed by Pakistan and Zimbabwe.