The summoner name or tag is incorrect
gunslinger #1901
PLATINUM III
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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: 28
280,092
lvl: 27
282,111
lvl: 27
277,236
lvl: 24
248,893
lvl: 20
209,499
lvl: 16
191,047
lvl: 16
145,503
lvl: 14
128,387
lvl: 12
120,045
lvl: 11
132,433
lvl: 11
130,010
lvl: 10
98,785