Ramires, Centre Midfielder, Age: 25, Brazilian
Asking Ramires to screen the back four is like telling Cristiano Ronaldo to stay on the left. The Brazilian was solid against Stoke City but will be exposed against better opposition. This is assuming, however, he decides to go on one of his trademark bombarding runs.
David Luiz, Centre-Back, Age: 25, Brazilian
Worth a shot in midfield if his displays at centre-back continue to decline (which they will).
One of my favourite footballing quotes is when Francisco Filho told a then-16-year-old kid named William Gallas: "William, as an attacker, you don't score goals. In midfield, you don't make any, so we are going to try you in defence."
David, you go walk about in defence, you sometimes think you're a centre forward and your tackling is hit-and-miss.
Here's an interesting excerpt from one of Tim Vickery's columns in 2007: "Arturo Vidal—powerful utility man who says he'll be the world's best centre-back in a few years."
In the span of five years, Vidal went from a centre-back to a world-class box-to-box midfielder. One can surmise his tendency to maraud forward, and his hyperactivity prompted his switch to a full-time midfielder.
Oriol Romeu, Centre Midfielder, Age: 21, Spanish
Will be an elite midfielder with or without Chelsea.
Sell him. The Blues aren't a feeder club.
Once he develops and becomes a starter, he'll want to go back home. He isn't even a regular and he's already contemplating about returning to Barça:
I've always felt like a big Barcelona supporter, I am very grateful to FC Barcelona and it's thanks to them that I am where I am. I wanted to play more and Chelsea showed confidence in me, but if FC Barcelona want you to play, well...