The summoner name or tag is incorrect
doctorfootball #na1
EMERALD IV
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Match History for Patch: 16.6.1
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Champion Stats for Patch: 16.6.1
Champion Mastery
lvl: 14
153,540
lvl: 11
91,222
lvl: 10
85,845
lvl: 10
84,571
lvl: 10
79,221
lvl: 9
66,250
lvl: 8
63,732
lvl: 8
60,704
lvl: 8
58,395
lvl: 7
50,128
lvl: 7
49,964
lvl: 7
49,792