How are champion matchup win rates calculated?

Win rates are calculated from thousands of ranked games in Emerald+ elo on the current patch. Data is sourced from OP.GG and updated regularly.

What does a 55% win rate matchup mean?

A 55% win rate means Champion 1 wins 55 out of every 100 games against Champion 2 in ranked. Anything above 52% is considered a favorable matchup.

Do matchup win rates change every patch?

Yes. Champion buffs, nerfs, item changes, and meta shifts can all affect matchup win rates. Our data updates with each new patch.

Should I always pick the counter champion?

Not necessarily. Comfort and experience on a champion often matter more than counter-picking, especially below Diamond. A 2-3% win rate difference is easily overcome by champion mastery.

What rank is the matchup data from?

All matchup data is sourced from Emerald+ ranked games to ensure the data reflects skilled play. Lower elo matchups can differ significantly.

Patch 26.9 Data

Champion Matchups

Pick two champions and see who wins. Win rates, counters, and tips powered by live ranked data.

Champion 1

Master Yi

Champion 2

Rammus

46.9%

Master Yi win rate vs Rammus

Rammus has the edge

2,353

Games Analyzed

46.9%

Master Yi WR

53.1%

Rammus WR

-249

Avg Gold Diff @15

Power Spike Timeline

Rammus Level 3

Master Yi Level 6

Rammus Level 6

Rammus Thornmail

Master Yi 2 items

Master Yi 3 items

How to Play This Matchup

Power Curve

Master Yi is strongest late game while Rammus peaks mid game. Play around your power window.

Mixed Resistances

Master Yi deals AD damage while Rammus deals Mixed. Build resistances accordingly Ã¢â‚¬â€ don't stack the wrong type.

Exploit Master Yi's Weakness

Master Yi's main weakness: Hard CC, burst before Q, early invades. Play around this to maximize your advantage.

Master Yi Win Condition

Scale, Q resets in teamfights, R makes untargetable

Rammus Win Condition

Q roll ganks, W reflects AD damage, R AoE slow, anti-AD

Recommended Items

Master Yi

Blade of the Ruined King

Core

Build every game

Guinsoo's Rageblade

Core

Build every game

Wit's End

Core

Build every game

Rammus

Thornmail

Core

Build every game

Dead Man's Plate

Core

Build every game

Gargoyle Stoneplate

Core

Build every game

Plated Steelcaps

Defensive

Armor boots vs Master Yi's AD damage

Bramble Vest

Counter

Grievous wounds + armor vs Master Yi's sustain/autos

Master Yi's Worst Matchups

Rammus's Worst Matchups

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