The summoner name or tag is incorrect
stew #7347
SILVER I
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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: 23
239,642
lvl: 20
194,288
lvl: 18
173,947
lvl: 7
46,532
lvl: 6
37,576
lvl: 5
25,449
lvl: 5
24,289
lvl: 4
17,786
lvl: 4
14,837
lvl: 4
14,476
lvl: 3
8,796
lvl: 3
8,403