Time to Drop Terry & Rio and play Cahill and Smalling?

Right now even if he agrees he can't do it as his every decision from now on with be watch closely. I do agree though they need to take the risk, Young have been great in these friendly game I wonder if the other might be able to do the same. Rio should be brop he cannot play in the past two season I believe he played less than 30 games for his club. He is injury prone and he is not getting any younger.