Horn is set for a massive 2018 after successfully defending his WBO welterweight championship with a late stoppage against Gary Corcoran on Wednesday night.
But despite Top Rank promoter Bob Arum's plan for an April clash with mandatory challenger Crawford in Las Vegas, no deal has been done and Horn's next opponent is far from settled.
Negotiations between Arum, Horn's trainer Glenn Rushton and Duco Events Boss Dean Lonergan kicked off on Thursday.
