Navarrete (33-1, 28 KOs) burst onto the world scene in December 2018, battering Isaac Dogboe over 12 rounds to win the WBO junior featherweight world title. He is 7-0 since then, including five title defenses, all by stoppage. Navarrete moved up to featherweight and picked up the vacant WBO world title last October with a unanimous decision over the previously undefeated Ruben Villa. Diaz (26-2, 16 KOs) is not unbeaten, but he is battle-tested, having challenged Masayuki Ito for the WBO junior lightweight world title in July 2018. He lost to Ito by unanimous decision and has gone 3-1 since moving down to featherweight. Diaz rebounded from a 2019 points loss to Shakur Stevenson, besting former world title challenger Jason Sanchez over 10 rounds last June inside the MGM Grand Las Vegas Bubble.