- Win Rate
- 49.6%
- Pick Rate
- 2.3%
- Ban Rate
- 0.8%
Janna vs Sion
- Patch
- 26.20
- Games
- 3,021
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 12, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Janna vs Sion is a very close matchup in LoL patch 26.20. Janna wins with a 50.0% win rate (+0.0%) over Sion based on 10 games. Janna wins the early laning phase while Sion scales better into the late game. Below you'll find the best Janna build, runes, laning stats, and strategies for the Janna vs Sion matchup.
Janna Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Janna 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 Janna vs Sion?
Janna wins 55.6% of these games. With this many games the true rate is most likely between 26.7% and 81.1% (95% range).
- Expected
- 50.5% From both champions' overall Support win rates
- Matchup effect
- +5.1 pts Observed minus expected
- Sample
- 9 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
- Only 9 Janna vs Sion games were recorded in the Support role on patch 26.20 — too few to say who is favored. Treat the numbers below as provisional.
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 Janna and Sion 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 Janna'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.
Janna vs Sion Laning Stats
Only 9 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Janna vs Sion Win Rate by Game Length
Janna's win rate against Sion 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: Janna's results against Sion in short and long games are within the margin of error of each other.
Janna vs Sion 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 Janna Changes Against Sion
Only 9 games so far — too few to compare what Janna players do in this matchup with their usual choices (needs 20).
Best Janna Build vs Sion
Usual Janna build (Support)
79.5% win rate · 39 games
Against Sion
Not enough matchup-specific build data: only 0 of 9 Janna games against Sion carried a complete build, which is too few to recommend an item path from. Use Janna's standard build instead.
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 Janna Runes vs Sion
Usual Janna runes (Support)
Summon Aery
66.7% win rate · 27 games
Against Sion
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Janna 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
Janna matchup data for League of Legends patch 26.20. The table below shows Janna'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 Janna build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Janna Matchups
Hardest for Janna
Easiest for Janna
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.
Janna vs Sion FAQ - Patch 26.20
Who wins Janna vs Sion?
Only 9 Janna vs Sion games were recorded in the Support role on patch 26.20 — too few to say who is favored. Treat the numbers below as provisional.
What is Janna's win rate against Sion?
Janna wins 55.6% of 9 Support games against Sion on patch 26.20 (95% range 26.7–81.1%). Based on both champions' overall Support win rates, 50.5% would be expected.
Does Janna counter Sion?
There are only 9 Janna vs Sion games in this lane on patch 26.20 — too few to answer reliably yet.
Who wins lane, Janna or Sion?
There are not enough games with a 15-minute snapshot yet (9) to say who wins lane.
Does Janna outscale Sion?
There are too few games of each length to tell yet.
When is Sion strongest against Janna?
On current data there is no stage of the game where Sion is ahead of Janna beyond the margin of error.
What should Janna build against Sion?
There are not enough games for a matchup-specific core, so use Janna's usual Support core: Moonstone Renewer, Redemption, Mejai's Soulstealer.
What runes should Janna use against Sion?
Use Janna's usual Summon Aery page (Sorcery + Domination); there are too few games for a matchup-specific page.