Gabriel Bonfim believes a win over former champion Belal Muhammad can establish him as a legitimate UFC welterweight contender. Riding a four-fight winning streak and coming off a statement knockout of Randy Brown, the Brazilian enters his second consecutive main event with growing confidence. Yet Muhammad’s relentless pressure, wrestling and ability to thrive in long fights present a different challenge. For the former champion, it is a chance to halt a slide. For Bonfim, it is an opportunity to move closer to the title picture.