LAS VEGAS – Anthony Smith is fighting for a different and very personal reason when he steps into the octagon with Dominick Reyes at UFC 310 . In a matchup of former light heavyweight title challengers, Smith (37-20 MMA, 13-10 UFC) is set to take on Reyes (13-4 MMA, 7-4 UFC) on Saturday’s card at T-Mobile Arena (ESPN+ pay-per-view, ESPN2, Hulu, ESPN+ ) in what is an important fight in the overall landscape in the careers of both participants. All of that is moot to Smith, however, because just three weeks ago, he went through a personal tragedy. His longtime friend and coach Scott Morton suddenly died , and “Lionheart” is reeling from the fallout. “I need to destroy something,” Smith told MMA Junkie and other reporters at Wednesday’s UFC 310 media day. “That’s why I’m here.