The summoner name or tag is incorrect
lightning #7777
PLATINUM III
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Match History for Patch: 16.10.1
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Champion Stats for Patch: 16.10.1
Champion Mastery
lvl: 45
464,765
lvl: 31
313,305
lvl: 27
289,510
lvl: 14
125,792
lvl: 12
127,922
lvl: 11
109,471
lvl: 10
91,427
lvl: 10
84,157
lvl: 10
103,082
lvl: 9
67,967
lvl: 8
53,691
lvl: 7
52,170