Good sparring of Werdum and Siyar. Kid has got a chin on him. Took some heavy knees and shin shots to the head and didnt even stagger, even for a sparring match.
We all know Siyar got his striking and DHK got his grappling. Thing is, DHK's grappling is set up with Judo takedowns and not wrestling. That means for DHK to take Siyar down, he would have to close the distance, get in the clinch, and then proceed to take Siyar down, and there in-lies the problem. He has to get close to Siyar's striking range to initiate the takedown, which is not good. He can't set up the takedown from the outside with a single/double leg like a wrestler would.
Given that Siyar now trains with Blackzillians, I think he should have no problem finding plenty of grapplers to teach him to work his TDD.