Master Yivs Zac
Master Yi vs Zac is a decisive matchup in LoL patch 26.18. Zac wins with a 59.1% win rate (+18.3%) over Master Yi based on 71 games. Zac wins the early laning phase while Master Yi scales better into the late game. Below you'll find the best Master Yi build, runes, laning stats, and strategies for the Master Yi vs Zac matchup.
Master Yi Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Master Yi 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 Master Yi vs Zac?
Master Yi wins 40.6% of these games. With this many games the true rate is most likely between 29.8% and 52.4% (95% range).
- Expected
- 49.5% From both champions' overall Jungle win rates
- Matchup effect
- −8.9 pts Observed minus expected
- Sample
- 69 games Lane: Jungle
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.18 · Sep 11 – Sep 14
Key takeaways
- Current data slightly favors Zac, but the sample is too limited for a strong conclusion: Master Yi wins 40.6% of 69 games (95% range 29.8–52.4%).
- Both champions' overall Jungle win rates predict 49.5% for Master Yi; 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 294, within the margin of error (67 games).
- Master Yi players pick The Collector much less often against Zac: 25.1% of their other Jungle games, 11.6% 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 Master Yi 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 Master Yi'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.
Master Yi vs Zac Laning Stats
At 15 minutes
Solo kills are tracked from this patch on — 0 games have them so far, shown from 30.
Whole-game averages
Master Yi vs Zac Win Rate by Game Length
Master Yi'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: Master Yi's results against Zac in short and long games are within the margin of error of each other.
Master Yi 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)EvenMaster Yi gold at 15: +294
- First itemEvenMaster Yi: 0.3 min · Zac: 0.2 min
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Master Yi Changes Against Zac
Choices Master Yi players make noticeably more or less often in this matchup than in their other Jungle games.
The CollectorItemUsually25.1%vs Zac11.6%−13.5 pts
Berserker's GreavesBootsUsually56.0%vs Zac68.1%+12.1 pts40.4% WR here
Magical FootwearRuneUsually19.0%vs Zac29.0%+10.0 pts45.0% WR here
Plated SteelcapsBootsUsually10.8%vs Zac2.9%−7.9 pts
Best Master Yi Build vs Zac
Usual Master Yi build (Jungle)
71.2% win rate · 52 games
Against Zac
Not enough matchup-specific build data: only 9 of 35 Master Yi games against Zac carried a complete build, which is too few to recommend an item path from. Use Master Yi's standard build instead.
- Master Yi usually completes Gustwalker Hatchling first, at 0.3 min (median of 31 games).
- Zac usually completes Mosstomper Seedling first, at 0.2 min (median of 45 games).
- Skill priority: Q > E > W — 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 Master Yi Runes vs Zac
Usual Master Yi runes (Jungle)
Lethal Tempo
61.3% win rate · 62 games
Against Zac
Too few games for a matchup-specific rune page yet — use the usual page.
Master Yi matchup data for League of Legends patch 26.18. The table below shows Master Yi'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 Master Yi build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Master Yi Matchups
Hardest for Master Yi
Easiest for Master Yi
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.
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Master Yi vs Zac FAQ - Patch 26.18
Who wins Master Yi vs Zac?
Current data slightly favors Zac, but the sample is too limited for a strong conclusion: Master Yi wins 40.6% of 69 games (95% range 29.8–52.4%).
What is Master Yi's win rate against Zac?
Master Yi wins 40.6% of 69 Jungle games against Zac on patch 26.18 (95% range 29.8–52.4%). Based on both champions' overall Jungle win rates, 49.5% would be expected.
Does Master Yi counter Zac?
Not clearly. Master Yi wins 40.6% of 69 games against Zac, and the 95% range (29.8–52.4%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Master Yi or Zac?
Neither side reliably wins the lane: the average gold difference at 15 minutes is 294, within the margin of error (67 games).
Does Master Yi outscale Zac?
There are too few games of each length to tell yet.
When is Zac strongest against Master Yi?
On current data there is no stage of the game where Zac is ahead of Master Yi beyond the margin of error.
What should Master Yi build against Zac?
There are not enough games for a matchup-specific core, so use Master Yi's usual Jungle core: Kraken Slayer, Death's Dance, Terminus. The biggest change against Zac: The Collector (25.1% usually, 11.6% here).
What runes should Master Yi use against Zac?
Use Master Yi's usual Lethal Tempo page (Precision + Domination); there are too few games for a matchup-specific page. The biggest change against Zac: Magical Footwear (19.0% usually, 29.0% here).