Ottawa Senators fans may have to wait longer than expected to get their first look at Brady Tkachuk in meaningful action.

The No. 4 overall pick in the 2018 draft is doubtful to play in the team's season opener on Thursday against the Chicago Blackhawks, general manager Pierre Dorion told TSN 1200 on Tuesday.

"We're hopeful he'll be able to rejoin the team (soon)," Dorion said, according to the Ottawa Citizen's Bruce Garrioch. "It's nothing serious, it's a nagging little injury and we want to be cautious."

Meanwhile, veteran forward Marian Gaborik will begin the season on injured reserve. The oft-injured sniper underwent back surgery in April, but was originally expected to only miss eight weeks. On Sept. 12, Dorion said there's no guarantee he would play this season.

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