The summoner name or tag is incorrect
ciel #993
EMERALD IV
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Match History for Patch: 16.4.1
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Champion Stats for Patch: 16.4.1
Champion Mastery
lvl: 66
694,034
lvl: 43
449,078
lvl: 25
250,603
lvl: 18
171,552
lvl: 12
105,584
lvl: 11
97,324
lvl: 11
90,089
lvl: 11
105,944
lvl: 10
81,455
lvl: 9
80,097
lvl: 9
66,885
lvl: 8
62,069