The summoner name or tag is incorrect
dumbant #0000
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: 37
372,672
lvl: 17
158,766
lvl: 15
159,629
lvl: 13
111,343
lvl: 12
100,991
lvl: 11
94,068
lvl: 9
68,078
lvl: 8
67,586
lvl: 7
43,519
lvl: 6
49,665
lvl: 6
41,867
lvl: 6
41,174