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.
Gold+ Champions Analysed: 35,645,721
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 support vs bottom Counters
Presently there is insufficent games played by Karthus support on Patch 14.19 to determine the strongest bottom counters. A matchup requires a minimum of 100 games to be displayed.
Jhin
el Virtuoso
Karthus wins against Jhin 34.05% of the time which is 13.65% lower against Jhin than the average opponent.
After normalising both champions win rates Karthus wins against Jhin 7.90% less often than would be expected.
The average opponent winrate against Jhinis 47.70%.
Jinx
la Bala Perdida
Karthus wins against Jinx 47.62% of the time which is 2.62% lower against Jinx than the average opponent.
After normalising both champions win rates Karthus wins against Jinx 3.17% more often than would be expected.
The average opponent winrate against Jinxis 50.24%.
Kai'Sa
La Hija del Vacío
Karthus wins against Kai'Sa 49.10% of the time which is 0.05% lower against Kai'Sa than the average opponent.
After normalising both champions win rates Karthus wins against Kai'Sa 5.73% more often than would be expected.
The average opponent winrate against Kai'Sais 49.15%.