Gullermo Rigondeaux will defend his RING, WBA and WBO junior featherweight titles against Sod Kokietgym on July 19 in Macau, China, Top Rank announced on Saturday.

Rigondeaux (13-0, eight knockouts) is coming off back-to-back unanimous decisions over Nonito Donaire last April and Joseph Agbeko in December. Rigondeaux won the WBO belt in the Donaire fight.

The 36-year-old Kokietgym (63-2-1, 28 KOs) has had only two fights of note in his long career, losses to Daniel Ponce de Leon in 2005 and 2006. Ponce de Leon won the vacant WBO 122-pound title in the first fight and successfully defended it in the second.

Kokietgym is 36-0-1 since that second fight but has faced obscure opponents only in his home country of Thailand during that stretch.

Also on the card will be two-time Chinese Olympic champion Zou Shiming (4-0, 1 KO), a flyweight; former flyweight titleholder Brian Viloria (33-4, 19 KOs); Mexican super middleweight Gilberto Ramirez (28-0, 22 KOs); and 2012 Russian Olympic gold medalist Egor Mekhontsev, a light heavyweight. None of their opponents has been determined.

In addition, junior bantamweight Rex Tso (12-0, 8 KOs), lightweight Ik Yang (13-0, 8 KOs) and junior middleweight Ng Kuok Kun (4-0, 2 KOs) are in separate bouts.

OLEKSANDR USYK RISES TO 4-0

Ukrainian heavyweight Oleksandr Usyk, a 2012 Olympic gold medalist, stopped Cesar David Crenz in the fourth round of a scheduled eight-round cruiserweight bout Saturday in Odessa, Ukraine.

Usyk floored (4-0, four KOs) Crenz (21-9, 13 KOs) in the third and fourth rounds.

"This was another terrific win for Oleksandr in front of a sold out house at the Sport Palace," said Alexander Krassyuk of K2 Promotions. "The support he's received from media and fans has been overwhelming, and we look forward to announcing his next fight in the near future."