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: 25,612,396
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 top vs jungle Counters
Presently there is insufficent games played by Karthus top on Patch 14.18 to determine the strongest jungle counters. A matchup requires a minimum of 100 games to be displayed.
Lee Sin
Moine aveugle
Karthus wins against Lee Sin 42.47% of the time which is 6.97% lower against Lee Sin than the average opponent.
After normalising both champions win rates Karthus wins against Lee Sin 8.40% less often than would be expected.
The average opponent winrate against Lee Sinis 49.44%.
Viego
Roi déchu
Karthus wins against Viego 51.06% of the time which is 2.37% higher against Viego than the average opponent.
After normalising both champions win rates Karthus wins against Viego 0.94% more often than would be expected.
The average opponent winrate against Viegois 48.69%.
Kha'Zix
Faucheur du Néant
Karthus wins against Kha'Zix 51.20% of the time which is 3.33% higher against Kha'Zix than the average opponent.
After normalising both champions win rates Karthus wins against Kha'Zix 1.90% more often than would be expected.
The average opponent winrate against Kha'Zixis 47.87%.