"We've had continued dialogue," Nill told the Stars website. "They've got where they think they should be and we've presented where we think we should be, and we just continue to discuss."
Seguin, a center who scored an NHL career-high 40 goals and had 78 points in 82 games for Dallas last season, is entering the final season of a six-year contract that will pay him $5.75 million in 2018-19. He led the Stars in goals last season and was second in points, one behind linemate Jamie Benn.
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Nill said the negotiation process is about more than just working out the length of the contract and the money involved regarding Seguin, who can become an unrestricted free agent after this season. The 26-year-old became eligible to sign an extension of up to eight years with Dallas on July 1.
"I think I have mentioned from Day One that I don't want people to panic if he is not signed when the season starts (Oct. 4)," Nill said. "I think the biggest thing is we need to have a good season, get off to a good start. I hope he is signed by then, but I know if he isn't, we'll get a good year out of him and go from there. But like I said, I am hopeful we can get it done. We'll have to see."
The Stars acquired Seguin in a trade with the Boston Bruins on July 4, 2013. In five seasons with Dallas, he has 384 points (173 goals, 211 assists) in 387 games. In eight NHL seasons with the Stars and Bruins, he has 505 points (229 goals, 276 assists).
Dallas has failed to qualify for the Stanley Cup Playoffs in three of the past five seasons, including the past two. Seguin won the Cup in 2011 with the Boston, which selected him with the No. 2 pick in the 2010 NHL Draft.
"There are a lot of different things that go into this," Nill said. "There are signing bonuses, lockout protections. There are a lot of different angles to these negotiations that come into play. We're just continuing the dialogue and going from there."