Quick predictions...

I think Michael Johnson easily out wrestles Alex Caceres and may finish him b Sub.
Kyle Watson and Aaron Wilkinsons is far better fight and I think Wilinson can avoid the takedowns and win on the feet UD.

Seeing as Nam Phan and Jonathan Brookins won their quarters in the previous episode are they now matched in a semi final?
That'll be a very good fight as they have a common strength in Jiu Jitsu and grappling, so they may opt to strike it out.