The summoner name or tag is incorrect
mootes #2300
SILVER 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: 12
98,754
lvl: 11
89,701
lvl: 9
75,018
lvl: 8
63,489
lvl: 8
54,424
lvl: 8
54,100
lvl: 7
45,855
lvl: 7
45,665
lvl: 6
41,104
lvl: 6
40,457
lvl: 6
40,129
lvl: 6
38,532