The summoner name or tag is incorrect
ocon #9999
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: 21
207,061
lvl: 12
98,280
lvl: 11
92,572
lvl: 11
87,102
lvl: 9
65,323
lvl: 8
58,954
lvl: 7
52,226
lvl: 7
50,782
lvl: 7
47,964
lvl: 7
44,501
lvl: 7
42,632
lvl: 6
35,254