The greatest champs globally to counter Nasus include Aphelios, Draven, and Tristana. These are all good at countering Nasus with high win rates over 57%. Even if these Nasus counter picks are not picked in the same position as you, it's not a good idea to take him into any of these matchups. They will very likely beat Nasus.
Conversely, if the opposite team brings either Karthus or Amumu, Nasus mains should seriously consider picking him, as he easily destroys these champions with win rates over 53% against both ofthem.
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