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

Diana

51.8%

Cassiopeia win rate vs Diana

Skill matchup — could go either way

195

Games Analyzed

51.8%

Cassiopeia WR

48.2%

Diana WR

+143

Avg Gold Diff @15

Power Spike Timeline

Cassiopeia Level 2

Cassiopeia Level 6

Diana Level 6

Diana 1 item

Cassiopeia 2 items

Diana 2 items

How to Play This Matchup

Power Curve

Cassiopeia is strongest late game while Diana peaks mid game. Play around your power window.

MR Priority

Both deal magic damage. An early Null-Magic Mantle or Mercury's Treads can swing the lane. Hexdrinker is also an option for AD champs.

Range Advantage

Cassiopeia has range advantage. Diana 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 Diana's Weakness

Diana's main weakness: Pre-6 weak, kiting, CC before R. Play around this to maximize your advantage.

Cassiopeia Win Condition

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

Diana Win Condition

R into grouped enemies for massive AoE, dive backline

Recommended Items

Cassiopeia

Archangel's Staff

Core

Build every game