The Hawks and Al Horford continue to discuss a possible contract.

Monday's 11:59 p.m. ET deadline for contract extensions looms and Horford appears to be the most likely candidate remaining to receive a deal.

One source close to the negotiations told ESPN.com's Marc Stein on Sunday that the parties "are still talking" and says a deal -- rated as "probable" by another source last week -- is a "50-50" shot at this point.