there's zero in the Tkachuk hit that looks remotely dirty.
go through frame by frame, and Tkachuk's skate looks like its back on that ice just before the contact.
yes, he makes contact with Scheiffle's exposed leg/angle on the contact, but this stuff is happening at full speed, not sure what else tkachuk was supposed to do when Scheiffle was dragging his leg behind on the late turn and Tkachuk's right leg was also turning to try finishing contact on the check.
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