When the Stars were trying to hold off a charge from the Maple Leafs in Toronto on Thursday, they entrusted Tyler Seguin to win key faceoffs and play well defensively against John Tavares.Seguin delivered, continuing the defensive responsibilities dealt to him last year under previous coach Ken Hitchcock. Seguin submitted a shift that lasted 2:30 late in the third period, and did not get off the ice until just 22 seconds remained."I enjoy penalty killing and a night like tonight, Tavares was doing good on me in faceoffs," Seguin said.