

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.
Diamond Champions Analysed: 4,092,247
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 bottom vs jungle Counters
Presently there is insufficent games played by Karthus bottom on Patch 15.9 to determine the strongest jungle counters. A matchup requires a minimum of 100 games to be displayed.


Kayn
the Shadow Reaper
Karthus wins against Kayn 49.06% of the time which is 0.86% higher against Kayn than the average opponent.
After normalising both champions win rates Karthus wins against Kayn 2.42% less often than would be expected.
The average opponent winrate against Kayn is 48.20%.


Viego
The Ruined King
Karthus wins against Viego 55.80% of the time which is 5.39% higher against Viego than the average opponent.
After normalising both champions win rates Karthus wins against Viego 2.11% more often than would be expected.
The average opponent winrate against Viego is 50.41%.


Jarvan IV
the Exemplar of Demacia
Karthus wins against Jarvan IV 58.18% of the time which is 10.16% higher against Jarvan IV than the average opponent.
After normalising both champions win rates Karthus wins against Jarvan IV 6.88% more often than would be expected.
The average opponent winrate against Jarvan IV is 48.02%.