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

Karthus

Champion 2

Master Yi

48.1%

Karthus win rate vs Master Yi

Skill matchup — could go either way

372

Games Analyzed

48.1%

Karthus WR

51.9%

Master Yi WR

-150

Avg Gold Diff @15

Power Spike Timeline

Karthus Level 6

Master Yi Level 6

Karthus 1 item

Master Yi 2 items

Karthus 3 items

Master Yi 3 items

How to Play This Matchup

Power Curve

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

Mixed Resistances

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

Mirror Playstyle

Both champions play a sustained style. The one with better execution and itemization wins. Focus on spacing and cooldown tracking.

Range Advantage

Karthus has range advantage. Master Yi should look for short trades when Karthus uses abilities on the wave. Freeze near your tower and wait for jungle help or an all-in window.

Exploit Karthus's Weakness

Karthus's main weakness: Invaded early, immobile, Zhonya's blocks R. Play around this to maximize your advantage.

Karthus Win Condition

R global damage, passive keeps dealing damage after death

Master Yi Win Condition

Scale, Q resets in teamfights, R makes untargetable

Recommended Items

Karthus

Liandry's Anguish

Core

Build every game

Shadowflame