A middleweight division attraction has been added to UFC 183 as Thiago Santos will see action against Andy Enz. Santos has only won just one of three fights under the UFC banner, with that lone win coming over Ronny Markes at UFC Fight Night: Shogun vs. Henderson II. Enz is currently winless under the UFC banner, having dropped fights to both Clint Hester and Marcelo Guimaraes. UFC 183 takes place on January 31st from a location TBA in Las Vegas, Nevada with Anderson Silva and Nick Diaz headlining.