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

Zac

51.2%

Karthus win rate vs Zac

Skill matchup — could go either way

129

Games Analyzed

51.2%

Karthus WR

48.8%

Zac WR

+92

Avg Gold Diff @15

Power Spike Timeline

Zac Level 3

Karthus Level 6

Zac Level 6

Karthus 1 item

Zac 2 items

Karthus 3 items

How to Play This Matchup

Power Curve

Karthus is strongest late game while Zac 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

Karthus has range advantage. Zac 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 Zac's Weakness

Zac's main weakness: Grievous wounds, burst before blobs, invades early. Play around this to maximize your advantage.

Karthus Win Condition

R global damage, passive keeps dealing damage after death

Zac Win Condition

Long-range E engage, R displacement, blob passive revive

Recommended Items

Karthus