The summoner name or tag is incorrect
doctr #8063
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: 52
582,066
lvl: 17
154,176
lvl: 15
134,007
lvl: 14
126,137
lvl: 11
86,884
lvl: 10
80,462
lvl: 9
68,959
lvl: 9
65,574
lvl: 8
64,314
lvl: 8
56,048
lvl: 8
54,445
lvl: 7
51,947