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

Cassiopeia

Champion 2

Irelia

48.4%

Cassiopeia win rate vs Irelia

Skill matchup — could go either way

153

Games Analyzed

48.4%

Cassiopeia WR

51.6%

Irelia WR

-130

Avg Gold Diff @15

Power Spike Timeline

Cassiopeia Level 2

Irelia Level 2

Irelia Level 5

Cassiopeia Level 6

Irelia BORK

Cassiopeia 2 items

How to Play This Matchup

Survive to Scale

Irelia will try to bully you early. Give up CS if needed Ã¢â‚¬â€ your job is to not die. Cassiopeia outscales hard after 2 items. Play for farm, not fights.

Mixed Resistances

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

Range Advantage

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

Exploit Cassiopeia's Weakness

Cassiopeia's main weakness: Burst, hard engage, mana early. Play around this to maximize your advantage.

Cassiopeia Win Condition

E spam DPS, R stun if facing, no boots = more AP

Irelia Win Condition

Stack passive on minions, all-in with 4 stacks

Recommended Items

Cassiopeia

Archangel's Staff

Core

Build every game