The NBA is closing in on signing off on …

The NBA is closing in on signing off on a second “bubble” in Chicago for the eight teams that were not invited to play in Florida, enabling them to participate in a mini-training camp and subsequent games against other clubs with a target date of September, sources told ESPN on Thursday. The details are still being hammered out, and teams continue to push for an alternative plan that would enable them to hold mini-camps within their local markets and to explore the idea of establishing regional sites where teams could scrimmage against each other.