NEW YORK – Charles Oliveira praised Ilia Topuria , but says a lightweight move won’t be easy. UFC featherweight champion Topuria (16-0 MMA, 8-0 UFC), who’s coming off back-to-back knockouts of Alexander Volkanovski and Max Holloway , is confident he can become the first to submit UFC lightweight champ Islam Makhachev. A former lightweight champion, Oliveira (34-10 MMA, 22-10 UFC) acknowledges Topuria’s skillset, but reminds him of the shark tank in his division. “Ilia is a tough fighter – someone who talks the talk and walks the walk,” Oliveira said through an interpreter during Wednesday’s UFC 309 media day. “He’s doing things.