The summoner name or tag is incorrect
GRANDMASTER I
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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: 65
684,610
lvl: 19
183,724
lvl: 15
131,959
lvl: 14
128,708
lvl: 12
106,561
lvl: 12
103,098
lvl: 10
82,581
lvl: 10
75,972
lvl: 9
72,713
lvl: 8
62,394
lvl: 8
58,121
lvl: 8
55,936