Valentina Shevchenko Shevchenko (20-3) defended the UFC's 125-pound championship for the fourth time on Saturday, defeating Jennifer Maia (18-7-1) by unanimous decision.  Is she the best female MMA fighter ever?  Deiveson Figueiredo finished Alex Perez via guillotine choke at 1 minute, 57 seconds of the 1st round Saturday night to retain the UFC flyweight title in the main event of UFC 255 in Las Vegas.  Less than 2 hours after the fight, Figueiredo verbally agreed to defend the belt against top contender Brandon Moreno in the co-main event of UFC 256 on Dec. 12 in Las Vegas. WHO YOU GOT? Better in their Prime: Mike Tyson or Roy Jones Jr? Plus, fight announcements and previews!