The Celtics and point guard Terry Rozier will not come to an agreement on a contract extension prior to Monday’s deadline, two league sources told the Globe. According to one source, Rozier is determined to become a starting point guard in the NBA, and next summer will seek the minutes and money of a starter, perhaps in the $20 million-per-season range. “There’s not going to be any extension,’’ the source said. “It’s hard to envision a deal that would make sense for both sides.’’ It was never likely that Rozier, 24, would sign an extension given his current role as a backup to Kyrie Irving. Last week, Irving publicly declared his intention to re-sign with the Celtics after this season, making Rozier’s interest in a long-term extension on a team-friendly deal even more of a long shot. Irving likely will command a five-year, $189 million maximum-salary contract. Close The biggest headlines, delivered to your inbox Get news as it happens. Sign up for Boston.com’s email news alerts. Thanks for signing up!