Pedro may be exactly what is required against West Brom's huge back line, but as they will more likely sit very deep, running in behind them will be difficult as the space will not be there. Pulis if nothing else, knows the strengths and weaknesses of his teams and will set them up to soak it up and try to counter quickly should the opportunity arise, so Pedro, I would play higher up the field, it's as usual with Hazard. Costa with his new found discipline will be a nightmare for their Leviathan defence and they will be hell bound on provoking him, and hopefully forget to mark our little crackers. We will certainly need our passing game to be as good as it can be so Fabregas should start. I may be wrong (and usually are) but we may see the first formation change since the winning run started. 4-3-3 may be the best way to beat them. They (Pulis) will not be expecting it, and we could always revert to the system that has brought us success should it not bear fruit. Hope Pulis doesn't read this. Forza Azzure'.
ps. If you think I'm talking bollock's feel free to say so, but don't question my loyalty to the cause. Thanks in advance.