As first reported here earlier, Renato Sobral or 'Babalu' and Leandro Issa will be competing at ONE FC 4 in Kuala Lumpur, Malaysia. Today, the promotion announced their opponents, and that both bouts will serve as the headliner and co-headliner of the event respectively.

The former Strikeforce champion in Sobral will be making his debut at ONE Fighting Championship against DREAM Light Heavyweight GP Finalist, Tatsuya Mizuno (11-7).

As for the co-main event, it's going to be a battle between top grapplers as Leandro Issa (9-2), a BJJ champion from Evolve MMA will be facing leg lock master, Masakazu Imanari (25-10-2). The Ashikan Judan is fresh off an impressive inverted heel hook victory at ONE FC 3, while Issa was a stand out from ONE FC 1, showing a well rounded game to compliment his BJJ skills.

Related: Judo Chop: Masakazu Imanari Scares Kevin Belingon With A Nasty Inverted Heel Hook | Babalu Sobral Re-Booked For ONE FC 4

Check out the current rumored fight card after the jump.

ONE Fighting Championship 4: Destiny of Warriors
June 23, 2012 -- Stadium Negara, Kuala Lumpur, Malaysia

- Renato Sobral vs. Tatsuya Mizuno
- Masakazu Imanari vs. Leandro Issa
- Vuyisile Colossa vs. Rustam Khabilov
- Mitch Chilson
- Eddie Ng (Rumored)