The summoner name or tag is incorrect
dionicia #00001
SILVER II
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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: 29
285,062
lvl: 20
191,112
lvl: 15
141,487
lvl: 15
141,111
lvl: 13
108,664
lvl: 12
99,654
lvl: 10
84,583
lvl: 9
67,470
lvl: 9
67,428
lvl: 8
56,218
lvl: 8
56,069
lvl: 8
55,415