One of the biggest innings seen in a T20 World Cup, and one of the quickest, came in the first semi-final in Kolkata between New Zealand and South Africa. Finn Allen came to the crease and blasted New Zealand on their way with a brilliant 19 ball fifty. Chasing 170, New Zealand knew they had to start fast, and Allen provided that and much more. From the first few overs of the innings he went on the attack, destroying the South African bowlers from all over the ground as he showed no signs of letting up. The landmark came in the ninth over when Allen punched Keshav Maharaj to long off for one to reach the fifty mark off just nineteen balls, a "joint-fastest fifty of the World Cup. Just 19 balls. What a time to play a knock like this." The timing of this knock couldn't be any more perfect than in a high-stakes semi-final. Also Read | Watch: 6,4,4,4,4! Finn Allen Goes Berserk Against Bosch in T20 WC 2026 Semi-Final Fastest Fifty in T20 World Cup Knockouts This knock from Allen now sees him claim the title for the quickest fifty in a T20 World Cup knockout match; 19 balls - Finn Allen vs South Africa, 2026 20 balls - Yuvraj Singh vs Australia, 2007 22 balls - Michael Hussey vs Pakistan, 2010 23 balls - Heinrich Klaasen vs India, 2024 26 balls - Jason Roy vs New Zealand, 2016 27 balls - Marco Jansen vs New Zealand, 2026 Allen's innings is at the top of the tree and in one of the biggest matches in the T20 format. Also Read | Watch: Tim Seifert Takes a Nasty Blow to the Face off Ferguson’s Express Delivery in T20 WC 2026 SF Fastest T20 World Cup Fifties for New Zealand This innings also gives Allen another record as the fastest fifty for New Zealand in a T20 World Cup; he beats the previous record of Glenn Phillips who hit a 22 ball fifty earlier in this T20 World Cup against Canada. The top five for New Zealand read: Finn Allen - 19 balls vs South Africa, 2026 Glenn Phillips - 22 balls vs Canada, 2026 Tim Seifert - 23 balls vs UAE, 2026 Aaron Redmond - 23 balls vs Ireland, 2009 Glenn Phillips - 25 balls vs England, 2022 The innings gave New Zealand an early advantage in the chase and it will be remembered by many for a long time.