The summoner name or tag is incorrect
pelon #0619
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: 20
191,474
lvl: 18
187,260
lvl: 10
77,086
lvl: 6
38,349
lvl: 6
34,078
lvl: 6
32,356
lvl: 5
31,286
lvl: 5
23,581
lvl: 4
19,802
lvl: 4
18,084
lvl: 4
17,903
lvl: 4
16,428