LAS VEGAS – Dominick Reyes  knows his UFC 310 opponent Anthony Smith has been going through some personal struggles, but his sympathy stops when the cage door closes. Reyes (13-4 MMA, 7-4 UFC) meets Smith (37-20 MMA, 13-10 UFC) on the prelims of the final pay-per-view event of the year at T-Mobile Arena (ESPN+ pay-per-view, ESPN2, Hulu,  ESPN+ ). It’s a big fight for both former title challengers, but they enter with different mindsets. Reyes is eager to keep his momentum going, while Smith is just itching to just punch someone in the face