The summoner name or tag is incorrect
stephs2 #4964
PLATINUM III
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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: 12
101,171
lvl: 8
64,587
lvl: 8
61,663
lvl: 7
50,528
lvl: 7
50,356
lvl: 7
44,605
lvl: 6
40,140
lvl: 6
39,386
lvl: 6
35,616
lvl: 6
35,222
lvl: 6
34,890
lvl: 5
29,740