The summoner name or tag is incorrect
quickdice #123
EMERALD IV
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Match History for Patch: 16.9.1
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Champion Stats for Patch: 16.9.1
Champion Mastery
lvl: 16
145,079
lvl: 15
147,697
lvl: 12
104,083
lvl: 10
82,389
lvl: 7
51,849
lvl: 7
50,915
lvl: 6
36,582
lvl: 6
34,236
lvl: 5
27,479
lvl: 5
25,532
lvl: 4
16,586
lvl: 4
15,951