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: 39,110,003
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
Karthus middle on Patch 30 is the strongest counter to support champions of Rell, Karma & Nautilus. While Karthus middle is countered most by support champions of Senna, Soraka & Lulu. Below is a detailed breakdown of Karthus middle counters against support champions with a minimum of 100 games.
Senna
the Redeemer
Karthus wins against Senna 42.86% of the time which is 4.19% lower against Senna than the average opponent.
After normalising both champions win rates Karthus wins against Senna 5.70% less often than would be expected.
The average opponent winrate against Sennais 47.05%.
Soraka
the Starchild
Karthus wins against Soraka 44.36% of the time which is 2.73% lower against Soraka than the average opponent.
After normalising both champions win rates Karthus wins against Soraka 4.24% less often than would be expected.
The average opponent winrate against Sorakais 47.09%.
Lulu
the Fae Sorceress
Karthus wins against Lulu 45.96% of the time which is 1.32% lower against Lulu than the average opponent.
After normalising both champions win rates Karthus wins against Lulu 2.83% less often than would be expected.
The average opponent winrate against Luluis 47.28%.
Leona
the Radiant Dawn
Karthus wins against Leona 46.97% of the time which is 1.51% lower against Leona than the average opponent.
After normalising both champions win rates Karthus wins against Leona 3.02% less often than would be expected.
The average opponent winrate against Leonais 48.48%.
Milio
The Gentle Flame
Karthus wins against Milio 47.10% of the time which is 0.59% lower against Milio than the average opponent.
After normalising both champions win rates Karthus wins against Milio 2.10% less often than would be expected.
The average opponent winrate against Miliois 47.69%.
Nami
the Tidecaller
Karthus wins against Nami 47.69% of the time which is 0.66% higher against Nami than the average opponent.
After normalising both champions win rates Karthus wins against Nami 0.85% less often than would be expected.
The average opponent winrate against Namiis 47.03%.
Seraphine
the Starry-Eyed Songstress
Karthus wins against Seraphine 49.11% of the time which is 0.95% higher against Seraphine than the average opponent.
After normalising both champions win rates Karthus wins against Seraphine 0.56% less often than would be expected.
The average opponent winrate against Seraphineis 48.16%.
Thresh
the Chain Warden
Karthus wins against Thresh 50.16% of the time which is 2.07% higher against Thresh than the average opponent.
After normalising both champions win rates Karthus wins against Thresh 0.56% more often than would be expected.
The average opponent winrate against Threshis 48.09%.
Pyke
the Bloodharbor Ripper
Karthus wins against Pyke 50.21% of the time which is 1.43% higher against Pyke than the average opponent.
After normalising both champions win rates Karthus wins against Pyke 0.08% less often than would be expected.
The average opponent winrate against Pykeis 48.78%.
Blitzcrank
the Great Steam Golem
Karthus wins against Blitzcrank 51.41% of the time which is 2.40% higher against Blitzcrank than the average opponent.
After normalising both champions win rates Karthus wins against Blitzcrank 0.89% more often than would be expected.
The average opponent winrate against Blitzcrankis 49.01%.
Janna
the Storm's Fury
Karthus wins against Janna 51.75% of the time which is 4.97% higher against Janna than the average opponent.
After normalising both champions win rates Karthus wins against Janna 3.46% more often than would be expected.
The average opponent winrate against Jannais 46.78%.
Lux
the Lady of Luminosity
Karthus wins against Lux 52.17% of the time which is 3.99% higher against Lux than the average opponent.
After normalising both champions win rates Karthus wins against Lux 2.48% more often than would be expected.
The average opponent winrate against Luxis 48.18%.
Rakan
The Charmer
Karthus wins against Rakan 52.29% of the time which is 3.39% higher against Rakan than the average opponent.
After normalising both champions win rates Karthus wins against Rakan 1.88% more often than would be expected.
The average opponent winrate against Rakanis 48.90%.
Braum
the Heart of the Freljord
Karthus wins against Braum 52.50% of the time which is 5.34% higher against Braum than the average opponent.
After normalising both champions win rates Karthus wins against Braum 3.83% more often than would be expected.
The average opponent winrate against Braumis 47.16%.
Nautilus
the Titan of the Depths
Karthus wins against Nautilus 54.24% of the time which is 4.55% higher against Nautilus than the average opponent.
After normalising both champions win rates Karthus wins against Nautilus 3.04% more often than would be expected.
The average opponent winrate against Nautilusis 49.69%.
Karma
the Enlightened One
Karthus wins against Karma 54.59% of the time which is 6.84% higher against Karma than the average opponent.
After normalising both champions win rates Karthus wins against Karma 5.33% more often than would be expected.
The average opponent winrate against Karmais 47.75%.
Rell
the Iron Maiden
Karthus wins against Rell 58.11% of the time which is 9.63% higher against Rell than the average opponent.
After normalising both champions win rates Karthus wins against Rell 8.12% more often than would be expected.
The average opponent winrate against Rellis 48.48%.