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

Janna

Champion 2

Amumu

46.4%

Janna win rate vs Amumu

Amumu has the edge

140

Games Analyzed

46.4%

Janna WR

53.6%

Amumu WR

-285

Avg Gold Diff @15

Power Spike Timeline

Janna Level 2

Amumu Level 3

Janna Level 6

Amumu Level 6

Janna 1 item

Amumu 1 item

How to Play This Matchup

Mid-Game Showdown

Both champions spike around the same time. The player who gets their first item faster wins. Focus on CS leads and smart trades to build an advantage before the mid-game.

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

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

Exploit Janna's Weakness

Janna's main weakness: Hard engage, poke, low kill pressure. Play around this to maximize your advantage.

Janna Win Condition

Disengage with Q+R, shield ADC, peel for carries

Amumu Win Condition

Double Q engage, R AoE stun wins teamfights

Recommended Items

Janna

Moonstone Renewer

Core

Build every game

Staff of Flowing Water