The summoner name or tag is incorrect
lantern #4297
SILVER III
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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: 13
109,321
lvl: 12
99,280
lvl: 11
95,845
lvl: 9
73,048
lvl: 8
57,905
lvl: 7
53,018
lvl: 7
52,573
lvl: 7
51,621
lvl: 7
50,227
lvl: 7
48,704
lvl: 7
46,674
lvl: 7
43,564