The summoner name or tag is incorrect
dillian #2000
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: 48
501,006
lvl: 31
336,760
lvl: 23
256,036
lvl: 20
191,491
lvl: 16
147,088
lvl: 15
139,846
lvl: 14
125,869
lvl: 13
116,239
lvl: 13
115,193
lvl: 13
114,025
lvl: 12
134,903
lvl: 10
115,450