- Win Rate
- 49.8%
- Pick Rate
- 2.0%
- Ban Rate
- 0.6%
Sion vs Thresh
- Patch
- 26.20
- Games
- 2,574
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 11, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Sion vs Thresh is a very close matchup in LoL patch 26.20. Sion wins with a 50.0% win rate (+0.0%) over Thresh based on 20 games. Sion holds the advantage in both the early and late game. Below you'll find the best Sion build, runes, laning stats, and strategies for the Sion vs Thresh 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 Thresh?
Sion wins 50.0% of these games. With this many games the true rate is most likely between 29.9% and 70.1% (95% range).
- Expected
- 48.4% From both champions' overall Support win rates
- Matchup effect
- +1.6 pts Observed minus expected
- Sample
- 20 games Lane: Support
- vs patch 26.19
- — Not enough games on both patches
Lane: Support · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.20 · Oct 10 – Oct 11
Key takeaways
- Sion vs Thresh is an even matchup: Sion wins 50.0% of 20 games, and the 95% range (29.9–70.1%) comfortably includes 50%.
- Both champions' overall Support win rates predict 48.4% for Sion; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Sion players pick Triumph far more often against Thresh: 11.4% of their other Support games, 30.0% 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 Thresh 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 Thresh Laning Stats
Only 19 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Sion vs Thresh Win Rate by Game Length
Sion's win rate against Thresh 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 Thresh in short and long games are within the margin of error of each other.
Sion vs Thresh 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)Insufficient data
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Sion Changes Against Thresh
Choices Sion players make noticeably more or less often in this matchup than in their other Support games.
TriumphRuneUsually11.4%vs Thresh30.0%+18.6 pts
PrecisionSecondary treeUsually11.8%vs Thresh30.0%+18.2 pts
Biscuit DeliveryRuneUsually17.6%vs Threshunder 2%−17.6 pts
Mortal ReminderItemUsually1.6%vs Thresh10.0%+8.4 pts
Ruby Crystal + Stealth WardStarting itemsUsuallyunder 0.5%vs Thresh5.0%+5.0 pts
Long Sword + Long Sword + Health Potion + Refillable Potion + Stealth WardStarting itemsUsuallyunder 0.5%vs Thresh5.0%+5.0 pts- W > E > Qthe W > E > Q skill orderSkill priorityUsuallyunder 0.5%vs Thresh5.0%+5.0 pts
Best Sion Build vs Thresh
Usual Sion build (Support)
30.0% win rate · 10 games
Against Thresh
Not enough matchup-specific build data: only 2 of 11 Sion games against Thresh carried a complete build, which is too few to recommend an item path from. Use Sion's standard build instead.
- 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 Thresh
Usual Sion runes (Support)
Grasp of the Undying
44.4% win rate · 27 games
Against Thresh
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 26.20. 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 Thresh FAQ - Patch 26.20
Who wins Sion vs Thresh?
Sion vs Thresh is an even matchup: Sion wins 50.0% of 20 games, and the 95% range (29.9–70.1%) comfortably includes 50%.
What is Sion's win rate against Thresh?
Sion wins 50.0% of 20 Support games against Thresh on patch 26.20 (95% range 29.9–70.1%). Based on both champions' overall Support win rates, 48.4% would be expected.
Does Sion counter Thresh?
Not clearly. Sion wins 50.0% of 20 games against Thresh, and the 95% range (29.9–70.1%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Sion or Thresh?
There are not enough games with a 15-minute snapshot yet (19) to say who wins lane.
Does Sion outscale Thresh?
There are too few games of each length to tell yet.
When is Thresh strongest against Sion?
On current data there is no stage of the game where Thresh is ahead of Sion beyond the margin of error.
What should Sion build against Thresh?
There are not enough games for a matchup-specific core, so use Sion's usual Support core: Axiom Arc, The Collector, Youmuu's Ghostblade. The biggest change against Thresh: Mortal Reminder (1.6% usually, 10.0% here).
What runes should Sion use against Thresh?
Use Sion's usual Grasp of the Undying page (Resolve + Precision); there are too few games for a matchup-specific page. The biggest change against Thresh: Triumph (11.4% usually, 30.0% here).