The summoner name or tag is incorrect
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: 146
1,617,248
lvl: 142
1,800,003
lvl: 117
1,306,195
lvl: 86
936,152
lvl: 41
486,951
lvl: 36
425,470
lvl: 30
347,047
lvl: 20
237,922
lvl: 13
155,189
lvl: 12
116,124
lvl: 12
104,686
lvl: 11
94,525