The summoner name or tag is incorrect
dragonite #149
SILVER 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: 39
402,094
lvl: 16
165,702
lvl: 16
146,282
lvl: 15
134,979
lvl: 15
133,910
lvl: 14
153,994
lvl: 13
131,325
lvl: 12
97,692
lvl: 12
102,788
lvl: 11
88,411
lvl: 11
109,162
lvl: 10
82,870