After a relatively quiet off-season, N.F.L. players and coaches are back in training camp.

The league’s owners and players union, though, have been at work for most of the summer, holding several rounds of talks about renewing their 10-year labor agreement, which is due to expire in March 2021. The N.F.L., though, wants to forge a new agreement sooner so it can focus on negotiations with television networks and technology companies for the rights to broadcast games.

The two sides will return to the bargaining table this week in Chicago at what is likely to be a pivotal moment in the negotiations. The handful of meetings thus far have largely been an exchange of ideas as each side tried to determine the other’s priorities. Those include issues like off-season practices and medical care for retired players.

In the coming weeks, the owners and union are expected to start discussing the single biggest issue of any potential labor deal: how to share the league’s roughly $14 billion in annual revenue.

In the current collective bargaining agreement, players get roughly 47 percent of the league’s revenue. It is widely expected that the percentage could rise to as much as 50 percent in a new deal, which would put football players closer in line with their brethren in the N.B.A..