The summoner name or tag is incorrect
pukebox #2001
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: 68
1,261,112
lvl: 52
552,359
lvl: 21
197,872
lvl: 19
178,687
lvl: 18
168,069
lvl: 14
126,835
lvl: 11
88,444
lvl: 9
67,690
lvl: 9
66,477
lvl: 8
60,845
lvl: 8
58,451
lvl: 8
57,130