Sejuanivs Zac
Sejuani vs Zac is a decisive matchup in LoL patch 26.19. Zac wins with a 61.9% win rate (+23.8%) over Sejuani based on 21 games. Zac holds the advantage in both the early and late game. Below you'll find the best Sejuani build, runes, laning stats, and strategies for the Sejuani vs Zac matchup.
Sejuani Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Sejuani 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 Sejuani vs Zac?
Sejuani wins 45.9% of these games. With this many games the true rate is most likely between 31.0% and 61.6% (95% range).
- Expected
- 51.6% From both champions' overall Jungle win rates
- Matchup effect
- −5.7 pts Observed minus expected
- Sample
- 37 games Lane: Jungle
- vs patch 26.18
- — Not enough games on both patches
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Zac, but the sample is too limited for a strong conclusion: Sejuani wins 45.9% of 37 games (95% range 31.0–61.6%).
- Both champions' overall Jungle win rates predict 51.6% for Sejuani; 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 185, within the margin of error (34 games).
- Sejuani players pick Thornmail much less often against Zac: 48.6% of their other Jungle games, 24.3% 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 Sejuani and Zac 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 Sejuani'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.
Sejuani vs Zac Laning Stats
At 15 minutes
Whole-game averages
Sejuani vs Zac Win Rate by Game Length
Sejuani's win rate against Zac 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: Sejuani's results against Zac in short and long games are within the margin of error of each other.
Sejuani vs Zac 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)EvenSejuani gold at 15: −185
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Sejuani Changes Against Zac
Choices Sejuani players make noticeably more or less often in this matchup than in their other Jungle games.
ThornmailItemUsually48.6%vs Zac24.3%−24.3 pts
Plated SteelcapsBootsUsually53.1%vs Zac32.4%−20.7 pts
Sunfire AegisItemUsually31.9%vs Zac16.2%−15.6 pts
Font of LifeRuneUsually90.0%vs Zac100.0%+10.0 pts45.9% WR here
Usually0.5%vs Zac5.4%+4.9 pts
Gustwalker Hatchling + Health Potion + Oracle LensStarting itemsUsually0.6%vs Zac5.4%+4.8 pts
Mosstomper Seedling + Health Potion + Stealth Ward + Oracle LensStarting itemsUsually1.2%vs Zac5.4%+4.2 pts
Best Sejuani Build vs Zac
Usual Sejuani build (Jungle)
79.3% win rate · 29 games
Against Zac
Not enough matchup-specific build data: only 2 of 16 Sejuani games against Zac carried a complete build, which is too few to recommend an item path from. Use Sejuani's standard build instead.
- Sejuani usually completes Mosstomper Seedling first, at 0.2 min (median of 26 games).
- 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 Sejuani Runes vs Zac
Usual Sejuani runes (Jungle)
Aftershock
55.1% win rate · 376 games
Against Zac
Aftershock40.0% win rate · 20 games
Plan your Sejuani 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
Sejuani matchup data for League of Legends patch 26.19. The table below shows Sejuani'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 Sejuani build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Sejuani Matchups
Hardest for Sejuani
Easiest for Sejuani
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.
Sejuani vs Zac FAQ - Patch 26.19
Who wins Sejuani vs Zac?
Current data slightly favors Zac, but the sample is too limited for a strong conclusion: Sejuani wins 45.9% of 37 games (95% range 31.0–61.6%).
What is Sejuani's win rate against Zac?
Sejuani wins 45.9% of 37 Jungle games against Zac on patch 26.19 (95% range 31.0–61.6%). Based on both champions' overall Jungle win rates, 51.6% would be expected.
Does Sejuani counter Zac?
Not clearly. Sejuani wins 45.9% of 37 games against Zac, and the 95% range (31.0–61.6%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Sejuani or Zac?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 185, within the margin of error (34 games).
Does Sejuani outscale Zac?
There are too few games of each length to tell yet.
When is Zac strongest against Sejuani?
On current data there is no stage of the game where Zac is ahead of Sejuani beyond the margin of error.
What should Sejuani build against Zac?
There are not enough games for a matchup-specific core, so use Sejuani's usual Jungle core: Hollow Radiance, Heartsteel, Thornmail. The biggest change against Zac: Thornmail (48.6% usually, 24.3% here).
What runes should Sejuani use against Zac?
Aftershock with Resolve and Precision — 40.0% over 20 games against Zac. The biggest change against Zac: Font of Life (90.0% usually, 100.0% here).