Sionvs Irelia
Sion vs Irelia is a decisive matchup in LoL patch 26.19. Irelia wins with a 54.2% win rate (+8.3%) over Sion based on 24 games. Irelia wins the early laning phase while Sion scales better into the late game. Below you'll find the best Sion build, runes, laning stats, and strategies for the Sion vs Irelia matchup.
Sion Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Sion 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 Sion vs Irelia?
Sion wins 42.2% of these games. With this many games the true rate is most likely between 29.0% and 56.7% (95% range).
- Expected
- 50.1% From both champions' overall Top win rates
- Matchup effect
- −7.9 pts Observed minus expected
- Sample
- 45 games Lane: Top
- vs patch 26.18
- — Not enough games on both patches
Lane: Top · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
They also met in another lane (Mid): 8 games, Sion won 50.0%.
Key takeaways
- Current data slightly favors Irelia, but the sample is too limited for a strong conclusion: Sion wins 42.2% of 45 games (95% range 29.0–56.7%).
- Both champions' overall Top win rates predict 50.1% for Sion; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Irelia usually wins the lane: 1,123 gold ahead of Sion at 15 minutes on average (45 games with a 15-minute snapshot).
- Sion players pick Plated Steelcaps far more often against Irelia: 51.8% of their other Top games, 86.7% 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 Sion and Irelia 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 Sion'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.
Sion vs Irelia Laning Stats
At 15 minutes
Whole-game averages
Sion vs Irelia Win Rate by Game Length
Sion's win rate against Irelia 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: Sion's results against Irelia in short and long games are within the margin of error of each other.
Sion vs Irelia 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)IreliaSion gold at 15: −1,123
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Sion Changes Against Irelia
Choices Sion players make noticeably more or less often in this matchup than in their other Top games.
Plated SteelcapsBootsUsually51.8%vs Irelia86.7%+34.8 pts41.0% WR here
ThornmailItemUsually32.4%vs Irelia66.7%+34.3 pts40.0% WR here
Sunfire AegisItemUsually22.2%vs Irelia42.2%+20.0 pts
Hollow RadianceItemUsually28.3%vs Irelia11.1%−17.1 pts
Mercury's TreadsBootsUsually21.4%vs Irelia4.4%−16.9 pts
Boots of SwiftnessBootsUsually20.5%vs Irelia4.4%−16.1 pts
Absolute FocusRuneUsually12.5%vs Ireliaunder 2%−12.5 pts
Biscuit DeliveryRuneUsually5.5%vs Irelia15.6%+10.0 pts
Best Sion Build vs Irelia
Usual Sion build (Top)
68.5% win rate · 54 games
Against Irelia
Not enough matchup-specific build data: only 7 of 29 Sion games against Irelia carried a complete build, which is too few to recommend an item path from. Use Sion's standard build instead.
- Irelia usually completes Blade of The Ruined King first, at 10.0 min (median of 45 games).
- Skill priority: Q > W > 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 Sion Runes vs Irelia
Usual Sion runes (Top)
Grasp of the Undying
56.4% win rate · 156 games
Against Irelia
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Sion 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
Sion matchup data for League of Legends patch 26.19. The table below shows Sion'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 Sion build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Sion Matchups
Hardest for Sion
Easiest for Sion
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.
Sion vs Irelia FAQ - Patch 26.19
Who wins Sion vs Irelia?
Current data slightly favors Irelia, but the sample is too limited for a strong conclusion: Sion wins 42.2% of 45 games (95% range 29.0–56.7%).
What is Sion's win rate against Irelia?
Sion wins 42.2% of 45 Top games against Irelia on patch 26.19 (95% range 29.0–56.7%). Based on both champions' overall Top win rates, 50.1% would be expected.
Does Sion counter Irelia?
Not clearly. Sion wins 42.2% of 45 games against Irelia, and the 95% range (29.0–56.7%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Sion or Irelia?
Irelia usually wins the lane: 1,123 gold ahead of Sion at 15 minutes on average (45 games with a 15-minute snapshot).
Does Sion outscale Irelia?
There are too few games of each length to tell yet.
When is Irelia strongest against Sion?
Irelia is measurably ahead in: Lane (15 min).
What should Sion build against Irelia?
There are not enough games for a matchup-specific core, so use Sion's usual Top core: Titanic Hydra, Heartsteel, Unending Despair. The biggest change against Irelia: Plated Steelcaps (51.8% usually, 86.7% here).
What runes should Sion use against Irelia?
Use Sion's usual Grasp of the Undying page (Resolve + Inspiration); there are too few games for a matchup-specific page. The biggest change against Irelia: Absolute Focus (12.5% usually, under 2% here).