Yefet was mostly right with his calls. There were some minor errors. I did not understand his first booking against Ajax defender Vertonghen; that collision came from both sides. Compliments to both assistants, they held their flags right with all numerous off sides. I did not notice any extra value of the goal assistants so far.
Yefet should read a football match better. When one team is only attacking (Ajax) and the other team (Timosoara) is only blocking play, it's almost an extra delay when the ref starts booking in extra time for delaying play... Furthermore Yefet was leading quite well.