The summoner name or tag is incorrect
s7ven #20000
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: 10
84,835
lvl: 9
72,023
lvl: 8
60,202
lvl: 8
56,140
lvl: 7
49,632
lvl: 7
44,823
lvl: 6
42,496
lvl: 6
41,083
lvl: 6
36,917
lvl: 5
29,721
lvl: 5
28,353
lvl: 5
27,257