MMA WEEKLY reports:

"A rematch between rivals Nick Diaz and Joe Riggs is set for the main card of Strikeforce "Carano vs. Cyborg" on Aug. 15. The bout will be for the newly created welterweight title.

Sources close to both fighters confirmed the news to MMAWeekly.com on Monday. An announcement from the promotion is expected shortly. 

Bad blood remains between the fighters. Following Riggs' decision victory over Diaz at UFC 57, the two brawled in a Las Vegas hospital until broken up by security. Both hit career skids later in 2006 and were released from the UFC. "

Sweet. Two dudes that hate each other, brawled inside a hospital and both of these guys are big time shit talkers. Another interesting thing about this are the recent things Riggs has been saying about Diaz's team mate Jake Shields, that should add more fuel to their rivalry. SOLID card for Strikeforce.

Anyone wanna add a picture for me? :)

Here is how the rumored card is looking so far:

- Gina Carano (7-0) vs. Cristiane “Cyborg” Santos (7-1) 
- Josh Thomson (16-2) vs. Gilbert Melendez (15-2) 
- Alistair Overeem (29-11) vs. Fabricio Werdum (11-4-1) 
- Nick Diaz (20-7) vs. Joe Riggs (30-10) 
- Jake Shields (23-4-1) vs. Matt Lindland (21-6)

- Erin Toughill (10-2-1) vs. Marloes Coenen (16-3) 
- Roger Gracie (2-0) vs. TBA 
- Billy Evangelista (9-1) vs. TBA 
- Poppies Martinez (16-5) vs. TBA

Thanks MMASupreMacy