Kog'Mawvs Sivir
Kog'Maw vs Sivir is a decisive matchup in LoL patch 26.19. Kog'Maw wins with a 63.2% win rate (+26.3%) over Sivir based on 19 games. Kog'Maw holds the advantage in both the early and late game. Below you'll find the best Kog'Maw build, runes, laning stats, and strategies for the Kog'Maw vs Sivir matchup.
Kog'Maw Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Kog'Maw performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.
Who wins Kog'Maw vs Sivir?
Kog'Maw wins 64.5% of these games. With this many games the true rate is most likely between 46.9% and 78.9% (95% range).
- Expected
- 55.9% From both champions' overall Bot win rates
- Matchup effect
- +8.6 pts Observed minus expected
- Sample
- 31 games Lane: Bot
- vs patch 26.18
- — Not enough games on both patches
Lane: Bot · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Kog'Maw, but the sample is too limited for a strong conclusion: Kog'Maw wins 64.5% of 31 games (95% range 46.9–78.9%).
- Both champions' overall Bot win rates predict 55.9% for Kog'Maw; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Neither side reliably wins the lane: the average gold difference at 15 minutes is 388, within the margin of error (31 games).
- Kog'Maw players pick Guinsoo's Rageblade much less often against Sivir: 81.5% of their other Bot games, 61.3% here.
How we calculate this
Games: ranked Solo/Duo and Flex games on the North America server from the patch shown. Remakes (games under 5 minutes) are excluded.
A game only counts when Kog'Maw and Sivir played the same position on opposite teams, so roaming, lane swaps within a team or a champion merely being in the same game never count as this matchup.
The 95% range is a Wilson score interval. Confidence comes from how wide that range is: within ±3 points is very high, ±5 high, ±8 moderate, anything wider low. Below 20 games a matchup is not classified at all.
Expected win rate combines both champions’ win rates in this lane (same games and filters) with the log5 formula: E = A(1−B) / (A(1−B) + B(1−A)). Matchup effect = observed − expected.
"What changes" compares Kog'Maw's choices in this matchup with the same champion's other games in the same lane, and lists a change only when it is at least 3 points and statistically significant (two-proportion z-test, |z| ≥ 2, 20+ games).
Results are not split by rank: the sample per rank is too small for honest per-rank matchup numbers.
Kog'Maw vs Sivir Laning Stats
At 15 minutes
Whole-game averages
Kog'Maw vs Sivir Win Rate by Game Length
Kog'Maw's win rate against Sivir by game length. The dot is the win rate, the bar its 95% range and the dashed line the champion's usual win rate at that length. Lengths with fewer than 25 games are left blank.
No game length stands out: Kog'Maw's results against Sivir in short and long games are within the margin of error of each other.
Kog'Maw vs Sivir Power Spikes
Who is ahead at each stage, measured from these games. A stage reads "Even" when the difference is inside the margin of error, and "Insufficient data" when there are too few games to tell.
- Lane (15 min)EvenKog'Maw gold at 15: +388
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Kog'Maw Changes Against Sivir
Choices Kog'Maw players make noticeably more or less often in this matchup than in their other Bot games.
Usually81.5%vs Sivir61.3%−20.2 pts
Usually52.0%vs Sivir32.3%−19.7 pts
Dusk and DawnItemUsually9.8%vs Sivir25.8%+16.0 pts
Presence of MindRuneUsually12.2%vs Sivir25.8%+13.6 pts
Press the AttackKeystoneUsually8.4%vs Sivir19.4%+11.0 pts
Doran's Ring + Health Potion + Health PotionStarting itemsUsually5.4%vs Sivir16.1%+10.7 pts
Adaptive Force (offense)Stat shardUsually4.0%vs Sivir12.9%+8.9 pts
Attack Speed (offense)Stat shardUsually95.5%vs Sivir87.1%−8.4 pts74.1% WR here
Best Kog'Maw Build vs Sivir
Usual Kog'Maw build (Bot)
68.3% win rate · 243 games
Against Sivir
Not enough matchup-specific build data: only 5 of 23 Kog'Maw games against Sivir carried a complete build, which is too few to recommend an item path from. Use Kog'Maw's standard build instead.
- Skill priority: W > Q > E — the same as usual.
Builds are ranked by the lower edge of their win rate range, not the raw win rate, so a build seen in a handful of wins never outranks a proven one.
Best Kog'Maw Runes vs Sivir
Usual Kog'Maw runes (Bot)
Lethal Tempo
56.6% win rate · 1,328 games
Against Sivir
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Kog'Maw draft in Draft Lab
Draft Lab lays out both teams lane by lane with live matchup win rates, damage profiles and game-phase lean, and suggests picks and bans from current meta data.
- Full 5v5 draft board
- Lane matchup win rates
- Pick and ban suggestions
Kog'Maw matchup data for League of Legends patch 26.19. The table below shows Kog'Maw's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Kog'Maw build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Kog'Maw Matchups
Hardest for Kog'Maw
Easiest for Kog'Maw
Win rate and games for each matchup. Lists are ranked by the edge of the 95% range so small samples cannot top them; matchups with at least 50 games only.
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Kog'Maw vs Sivir FAQ - Patch 26.19
Who wins Kog'Maw vs Sivir?
Current data slightly favors Kog'Maw, but the sample is too limited for a strong conclusion: Kog'Maw wins 64.5% of 31 games (95% range 46.9–78.9%).
What is Kog'Maw's win rate against Sivir?
Kog'Maw wins 64.5% of 31 Bot games against Sivir on patch 26.19 (95% range 46.9–78.9%). Based on both champions' overall Bot win rates, 55.9% would be expected.
Does Kog'Maw counter Sivir?
Not clearly. Kog'Maw wins 64.5% of 31 games against Sivir, and the 95% range (46.9–78.9%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Kog'Maw or Sivir?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 388, within the margin of error (31 games).
Does Kog'Maw outscale Sivir?
There are too few games of each length to tell yet.
When is Sivir strongest against Kog'Maw?
On current data there is no stage of the game where Sivir is ahead of Kog'Maw beyond the margin of error.
What should Kog'Maw build against Sivir?
There are not enough games for a matchup-specific core, so use Kog'Maw's usual Bot core: Terminus, Blade of The Ruined King, Guinsoo's Rageblade. The biggest change against Sivir: Guinsoo's Rageblade (81.5% usually, 61.3% here).
What runes should Kog'Maw use against Sivir?
Use Kog'Maw's usual Lethal Tempo page (Precision + Resolve); there are too few games for a matchup-specific page. The biggest change against Sivir: Presence of Mind (12.2% usually, 25.8% here).