

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: 47,722,172
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 top Counters
Presently there is insufficent games played by Karthus top on Patch 15.9 to determine the strongest top counters. A matchup requires a minimum of 100 games to be displayed.


Shen
the Eye of Twilight
Karthus wins against Shen 39.32% of the time which is 8.61% lower against Shen than the average opponent.
After normalising both champions win rates Karthus wins against Shen 6.54% less often than would be expected.
The average opponent winrate against Shen is 47.93%.


Sett
the Boss
Karthus wins against Sett 44.25% of the time which is 2.66% lower against Sett than the average opponent.
After normalising both champions win rates Karthus wins against Sett 0.60% less often than would be expected.
The average opponent winrate against Sett is 46.91%.


Teemo
the Swift Scout
Karthus wins against Teemo 58.72% of the time which is 10.86% higher against Teemo than the average opponent.
After normalising both champions win rates Karthus wins against Teemo 12.93% more often than would be expected.
The average opponent winrate against Teemo is 47.86%.