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

Rengar

52.5%

Karthus win rate vs Rengar

Karthus has the edge

259

Games Analyzed

52.5%

Karthus WR

47.5%

Rengar WR

+200

Avg Gold Diff @15

Power Spike Timeline

Rengar Level 3

Karthus Level 6

Rengar Level 6

Karthus 1 item

Rengar 1 item

Karthus 3 items

How to Play This Matchup

Power Curve

Karthus is strongest late game while Rengar peaks mid game. Play around your power window.

Mixed Resistances

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

Sustained vs Burst

Rengar wants to combo and disengage. Karthus wins extended trades. Don't let Rengar get a clean rotation Ã¢â‚¬â€ force long fights where sustain wins.

Range Advantage

Karthus has range advantage. Rengar 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 Rengar's Weakness

Rengar's main weakness: No bushes = weak, CC, grouped enemies, pink wards. Play around this to maximize your advantage.

Karthus Win Condition

R global damage, passive keeps dealing damage after death

Rengar Win Condition

Bush leap combos, R stealth assassinate, snowball kills

Recommended Items

Karthus

Liandry's Anguish

Core

Build every game

Shadowflame