The summoner name or tag is incorrect
david #0218
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: 59
622,636
lvl: 21
222,281
lvl: 16
169,179
lvl: 13
110,199
lvl: 11
89,087
lvl: 9
73,679
lvl: 8
61,439
lvl: 8
60,183
lvl: 7
66,365
lvl: 7
61,906
lvl: 7
51,080
lvl: 7
48,859