The NFL is considering adding virtual fans to games, sources told ESPN's Jeremy Fowler.
The league experimented with virtual fans during the draft in April, and a similar approach could be used when the season begins, Fowler adds.
The NBA has been using virtual fans during games in its Orlando bubble.
The NFL is also prepared to enhance the game-day experience with potentially large virtual backdrops inside venues, a source told Fowler.
Several teams have already announced limited-capacity plans for fans this season. The Raiders, meanwhile, will play in front of empty stands during their first year in Las Vegas, and the Green Bay Packers said Thursday fans won't be allowed at their first two home games. The Packers will then re-evaluate the situation and make a decision regarding their remaining home contests.