Report a cheating log
it shows ‘No data available in table’ for heroic Kel’Thuzad and heroic Sylvanas windrunner

according to this page Warcraft Logs - Combat Analysis for Warcraft

this rank1 unholy DK did about 3k dps more than rank2, its unusual, so i believe I have reason to doubt those logs might be cheating logs.

Please check it, thank you for your time.