The most obvious person on this list and certainly the most consensus-forming.
The overwhelming majority of Chelsea fans, from my own observations, are in agreement that Bosingwa is immensely questionable defensively.
He's favored now that his countryman André Villas-Boas has taken over the helm at Chelsea FC, but he's just not the kind of person you want out there in these in big matches. Against the smaller, easier teams maybe playing him at right-back is acceptable. But in these tough, high-profile games he really shouldn't even be on the subs bench.
His performance today was a joke, and his diabolical defending and immense lack of responsibility were the direct causes of André Santos' second half goal.
I realize that he's the best man for AVB's attacking-minded football since his abilities going forward mimic those of his counterpart Ashley Cole, but if your defenders can't defend they shouldn't be out there. I think it really is as simple as that.
So I think it's clear that in these matches against top-quality, big teams he should be nowhere near the pitch, as the games against Manchester United and Arsenal have conclusively shown.