The summoner name or tag is incorrect
nativeredman #3164
SILVER I
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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: 28
282,931
lvl: 20
188,370
lvl: 16
150,198
lvl: 11
139,882
lvl: 10
77,657
lvl: 10
77,214
lvl: 9
91,801
lvl: 9
69,499
lvl: 9
69,218
lvl: 8
63,939
lvl: 8
59,199
lvl: 8
56,327