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With 7.36 official Dota API stopped working.
Waiting for the fix for now and updating stuff to 7.36.
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Dota Pro Circuit 2023 Summer Tour

All regional leagues and Bali Major 2023

First Pick Winrate: 52.1989

Explain this to me
The page shows a hero's winrates against certain enemies, as well as winrate advantage (difference in winrate compared to overall value). Higher rank and winrate mean opponent is easier for the hero, higher R-Rank means opponent is picked often and is less effective against the hero.
HeroMatchesWinrate
viperViper1145.45%
OpponentRankRev-RankWinrateAdvantageMatchesWonLostExpected matchesDeviationPercentage
enchantressEnchantress100.002.94100.00%54.55%2201150.00%
faceless_voidFaceless Void97.0638.24100.00%54.55%22002100.00%
spirit_breakerSpirit Breaker94.1252.9460.00%14.55%5322360.00%
axeAxe91.188.82100.00%54.55%11001100.00%
jakiroJakiro91.188.82100.00%54.55%11001100.00%
juggernautJuggernaut85.2914.71100.00%54.55%110100.00%
rubickRubick85.2914.71100.00%54.55%110100.00%
svenSven79.4117.65100.00%54.55%11001100.00%
pangolierPangolier76.4723.53100.00%54.55%110100.00%
tidehunterTidehunter76.4723.53100.00%54.55%110100.00%
sniperSniper70.5926.47100.00%54.55%11001100.00%
medusaMedusa67.6535.29100.00%54.55%110100.00%
silencerSilencer67.6535.29100.00%54.55%110100.00%
keeper_of_the_lightKeeper of the Light67.6535.29100.00%54.55%110100.00%
undyingUndying58.8250.0050.00%4.55%2111150.00%
disruptorDisruptor58.8250.0050.00%4.55%2111150.00%
snapfireSnapfire58.8250.0050.00%4.55%2111150.00%
dark_seerDark Seer58.8250.0050.00%4.55%2111150.00%
queenofpainQueen of Pain47.0688.2433.33%-12.12%3121266.67%
techiesTechies44.1291.1833.33%-12.12%312300.00%
batriderBatrider41.18100.0016.67%-28.78%6152466.67%
shredderTimbersaw38.2497.060.00%-45.45%2021150.00%
abyssal_underlordUnderlord35.2985.290.00%-45.45%101100.00%
void_spiritVoid Spirit32.3582.350.00%-45.45%1012-1-100.00%
chenChen29.4179.410.00%-45.45%10101100.00%
naga_sirenNaga Siren26.4797.060.00%-45.45%2021150.00%
shadow_demonShadow Demon23.5373.530.00%-45.45%101100.00%
bloodseekerBloodseeker23.5358.820.00%-45.45%101100.00%
templar_assassinTemplar Assassin23.5373.530.00%-45.45%101100.00%
beastmasterBeastmaster23.5373.530.00%-45.45%101100.00%
windrunnerWindranger23.5373.530.00%-45.45%101100.00%
vengefulspiritVengeful Spirit8.8261.760.00%-45.45%10101100.00%
morphlingMorphling5.8858.820.00%-45.45%101100.00%
primal_beastPrimal Beast2.9479.410.00%-45.45%10101100.00%