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The answer changes twice depending on what you agree to count. A team can drop games for months and keep a streak alive, or win every game of a split and hold no record at all. Series and games are two different units, and the distance between the two numbers is wider than it looks.
Everything below counts series, not games. An LCK match is a best-of-three and a playoff match a best-of-five, so a run of this kind survives individual defeats — a team only breaks the streak when it loses the series itself.
The record: Gen.G 27 series
Gen.G won 27 consecutive best-of series in 2025. Their last defeat came in the LCK Cup final against Hanwha Life Esports on 23 February. The 27th win arrived on 23 July, against the same opponent, 150 days later.
The run took in 21 best-of-threes and six best-of-fives, across LCK Round 1-2, MSI, the Esports World Cup and LCK Round 3-5. Not one of the 27 was a best-of-one. That is the detail that separates this streak from the ones before it, because a team on a best-of-one run needs one bad draft to end it, and Gen.G had to be beaten twice or three times in a night, by every opponent they faced, for five months. Sixty games went their way at the very minimum.
The domestic records belong to them as well. Gen.G won 29 consecutive LCK matches in 2024, running from the Spring split into the Summer split, and the league's mark for consecutive game wins is theirs too, at 20, with 18 of them inside a single season.
T1: 26 series
T1 held both records before Gen.G took them, and they are still second on each.
Their 26 straight series in 2022 stood for three years. Their 24 consecutive LCK matches, set the same year, passed the 23 posted by SK Telecom T1 in 2015, which puts the same organisation at both ends of the old record with Lee "Faker" Sang-hyeok present for each.
The best of it came in the spring. T1 finished the 2022 Spring regular season 18-0, the first undefeated split in LCK history, sealed against DRX on 20 March. They lost seven games along the way and none of the eighteen series — the clearest illustration there is of how much a best-of-three format hides.
T1 also closed the 2025 story. They beat Gen.G 2-1 in LCK Round 3-5, days after the Esports World Cup, and the 27-series run ended there.
The perfect split: Fnatic, 18-0
The oldest version of the record is the one people remember, because it produces round numbers.
Fnatic went 18-0 through the 2015 EU LCS Summer regular season, the first perfect split in European history. The regular season was played in best-of-ones then, so the two units were the same thing: eighteen wins meant eighteen games, with nothing to hide behind.
The record survived the regular season and died in the playoffs. Origen took two games off Fnatic in the EU LCS final, the first the Fnatic roster had dropped in months, and Fnatic won the series 3-2 anyway to take the title. The same five players then reached the semi-finals at Worlds 2015, where the KOO Tigers stopped them. No European side has matched a full undefeated split since.
Why the modern numbers are harder
Every record on this list except Fnatic's was set in Korea, and every one of them came after the LCK moved away from best-of-ones in its regular season. Those two facts pull against each other.
Longer series should make streaks shorter, because a dominant team has to be beaten twice, not once, to lose a single fixture. The LCK has produced the longest runs anyway, which says less about format than about the gap between the top of that league and the rest of it in any given year.
Fearless Draft makes the next one harder still. A team that cannot reuse champions across a series has fewer ways to repeat a winning formula, and the comfort picks that carried these runs are gone by game three. Nobody has assembled a streak of this length under those rules yet.
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