Both fighters are coming off wins. Tibau has won his last two fights against John Cholish and Jamie Varner. Johnson recently came off a two-fight skid after he defeated Joe Lauzon.
UFC 168 is set for December 28 at the MGM Grand Garden Arena in Las Vegas, Nevada. The card will be headlined by two title fights with Chris Weidman defending his middleweight title against Anderson Silva and Ronda Rousey defending her women's bantamweight title against Miesha Tate.