I'd take the labrador out personally. Much better as an impact sub where his constant losing the ball, badly timed runs, and general busy play might be put to good use in the last 20mins.
Sorry, but Leo is 26 years old, he's had 72 hours to recover from Saturday, unless he's had a knock / injured, then I think that's plenty of recovery time no matter how exhausted and fully expect to see him lining up tonight.
Personally, I think Gus is trying to manage our expectations given...
Kuszczak
Bruno~El-Abd~Upson~Bridge
Bridcutt~Spanish Dave
Orlandi~Vicente~Buckley
Ulloa
CMS to be an impact sub if needed. Spanish Dave is showing himself to be diligent in defence and astute in attack. I'd have him playing a deeper role with Bridcutt. Buckley gives us pace so he's in for me.