I'm not going but would recommend the Hand in flower on Kensington High St right outside Olympia station (a reference not suggested stop as there are no tubes running). Probably about a 25 minute walk from the ground but big, open, good bar access and no Chelsea idiots to contend with.
Or the Famous Three Kings on the corner of North End Road and the A4 right outside West Kensington Tube. MASSIVE footballing pub with 3 huge screens and excellent spacious bar and again with no Chelsea plebs.
For the BHA v Palace FA Cup replay I went with my cousin who worked in London and knew of this wonderful pub. Spent a good few hours in there pre match.