Officials from the NFL and the NFLPA are scheduled to talk again Tuesday after a Monday call failed to resolve some of the major outstanding issues regarding reopening protocols, sources close to the situation told ESPN on Monday night.

With training camp for most teams scheduled to start in two weeks, there's a sense on both sides that coronavirus-related reopening protocols have to be settled within the next day or two, as players, coaches and other staff need to make their travel arrangements.

Monday's call, sources said, touched on some of the economic issues the league and union face as they confront the likelihood of lost revenue in 2020. But of more immediate concern are the rules under which players and staff will report and operate if training camps and the season start on time as is currently planned.