The summoner name or tag is incorrect
mayzus #323
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: 15
141,111
lvl: 15
133,720
lvl: 13
117,292
lvl: 10
81,362
lvl: 7
44,646
lvl: 6
37,986
lvl: 6
34,586
lvl: 6
32,924
lvl: 5
28,945
lvl: 5
28,484
lvl: 5
27,191
lvl: 5
25,977