

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: 20,192,848
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 support Counters
Presently there is insufficent games played by Karthus middle on Patch 15.3 to determine the strongest support counters. A matchup requires a minimum of 100 games to be displayed.


Lulu
Sorcière féérique
Karthus wins against Lulu 48.24% of the time which is 2.15% higher against Lulu than the average opponent.
After normalising both champions win rates Karthus wins against Lulu 2.09% less often than would be expected.
The average opponent winrate against Lulu is 46.09%.


Nami
Aquamancienne
Karthus wins against Nami 49.14% of the time which is 2.02% higher against Nami than the average opponent.
After normalising both champions win rates Karthus wins against Nami 2.23% less often than would be expected.
The average opponent winrate against Nami is 47.12%.


Karma
Sagesse incarnée
Karthus wins against Karma 53.30% of the time which is 5.53% higher against Karma than the average opponent.
After normalising both champions win rates Karthus wins against Karma 1.28% more often than would be expected.
The average opponent winrate against Karma is 47.77%.


Thresh
Garde aux chaînes
Karthus wins against Thresh 59.60% of the time which is 12.26% higher against Thresh than the average opponent.
After normalising both champions win rates Karthus wins against Thresh 8.01% more often than would be expected.
The average opponent winrate against Thresh is 47.34%.