This will vary because unlike other stat sites we include 100% of a brackets champions played and never include champions that don't belong in the bracket.
Emerald+ Champions Analysed: 23,149,732
We include 100% of the champions played of every selected tier bracket in our analysis, we never include champions from outside the tier quoted tier.
Karthus Counters
Karthus middle vs top Counters
Presently there is insufficent games played by Karthus middle on Patch 14.14 to determine the strongest top counters. A matchup requires a minimum of 100 games to be displayed.
Darius
the Hand of Noxus
Karthus wins against Darius 40.60% of the time which is 7.09% lower against Darius than the average opponent.
After normalising both champions win rates Karthus wins against Darius 7.34% less often than would be expected.
The average opponent winrate against Dariusis 47.69%.
Aatrox
the Darkin Blade
Karthus wins against Aatrox 44.25% of the time which is 3.95% lower against Aatrox than the average opponent.
After normalising both champions win rates Karthus wins against Aatrox 4.19% less often than would be expected.
The average opponent winrate against Aatroxis 48.20%.
Sett
the Boss
Karthus wins against Sett 47.66% of the time which is 0.78% higher against Sett than the average opponent.
After normalising both champions win rates Karthus wins against Sett 0.53% more often than would be expected.
The average opponent winrate against Settis 46.88%.
Garen
The Might of Demacia
Karthus wins against Garen 50.96% of the time which is 3.53% higher against Garen than the average opponent.
After normalising both champions win rates Karthus wins against Garen 3.28% more often than would be expected.
The average opponent winrate against Garenis 47.43%.