An important bantamweight fight is close to being added to UFC on FOX 23.

According to sources, Aljamain Sterling (12-1) vs. Raphael Assuncao (23-5) is targeted for the Jan. 28 card in Denver. The promotion has yet to officially announce the fight.

The 135-pound fight was originally scheduled for Dec. 9 in Albany, however, it was canceled after Sterling was forced to withdraw from the bout.

Both fighters are coming off losses: Sterling to Bryan Caraway via split decision in May and Assuncao to TJ Dillashaw via unanimous decision in July.

The event, headlined by Julianna Peña vs. Valentina Shevchenko, takes place place at the Pepsi Center in Denver.