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The International 2019 - Group Stage

Dota 2 World Championships Group Stage

Median hero picks: 9

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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
drow_rangerDrow Ranger30.00%
OpponentRankRev-RankWinrateAdvantageMatchesWonLost
sand_kingSand King100.0092.860.00%0.00%101
tinyTiny100.0092.860.00%0.00%101
lionLion100.0092.860.00%0.00%101
tidehunterTidehunter78.57100.000.00%0.00%202
warlockWarlock71.4392.860.00%0.00%101
leshracLeshrac71.4392.860.00%0.00%101
life_stealerLifestealer71.4392.860.00%0.00%101
chenChen71.4392.860.00%0.00%101
gyrocopterGyrocopter71.4392.860.00%0.00%101
alchemistAlchemist71.4392.860.00%0.00%101
shadow_demonShadow Demon71.4392.860.00%0.00%101
naga_sirenNaga Siren71.4392.860.00%0.00%101
tuskTusk71.4392.860.00%0.00%101
skywrath_mageSkywrath Mage71.4392.860.00%0.00%101