The summoner name or tag is incorrect
dionicia #00001
SILVER II
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Match History for Patch: 16.6.1
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Champion Stats for Patch: 16.6.1
Champion Mastery
lvl: 28
276,575
lvl: 19
183,193
lvl: 15
140,190
lvl: 15
138,097
lvl: 12
97,728
lvl: 12
105,273
lvl: 10
83,089
lvl: 9
67,470
lvl: 9
65,295
lvl: 8
55,377
lvl: 8
54,409
lvl: 7
51,300