The summoner name or tag is incorrect
lightningdragon #6068
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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: 144
2,752,437
lvl: 18
177,794
lvl: 13
114,747
lvl: 10
86,293
lvl: 10
83,933
lvl: 9
73,564
lvl: 9
66,836
lvl: 9
65,238
lvl: 8
60,959
lvl: 8
55,398
lvl: 8
55,285
lvl: 8
54,062