The Strikeforce card slated for August 15 could soon see the addition of another fine bout by revisiting a good old fashioned heated rivalry.

Nick Diaz (20-7) may get the opportunity to avenge a 2006 loss to Joe Riggs (30-10), a welterweight fight that could go down at Strikeforce: “Carano vs. Cyborg” at the HP Pavilion [...]