

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.
Master+ Champions Analysed: 1,545,301
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 bottom Counters
Presently there is insufficent games played by Karthus bottom on Patch 14 to determine the strongest bottom counters. A matchup requires a minimum of 100 games to be displayed.


Sivir
the Battle Mistress
Karthus wins against Sivir 41.75% of the time which is 6.53% lower against Sivir than the average opponent.
After normalising both champions win rates Karthus wins against Sivir 11.13% less often than would be expected.
The average opponent winrate against Sivir is 48.28%.


Yunara
the Unbroken Faith
Karthus wins against Yunara 50.79% of the time which is 2.57% higher against Yunara than the average opponent.
After normalising both champions win rates Karthus wins against Yunara 2.03% less often than would be expected.
The average opponent winrate against Yunara is 48.22%.


Kai'Sa
Daughter of the Void
Karthus wins against Kai'Sa 57.41% of the time which is 8.43% higher against Kai'Sa than the average opponent.
After normalising both champions win rates Karthus wins against Kai'Sa 3.83% more often than would be expected.
The average opponent winrate against Kai'Sa is 48.98%.