I fear Marcus is suffering from rather more than the jitters.
Listening to the remarks made by his manager it sounds like the fella's in the middle of something serious and deeply personal. Whatever the situation it takes a big man to admit he has a problem and step down. Whilst the Engand management looked for a raft of solutions the man withdrew himself, probably for the best for him, his family and his team-mates.
I hope the filth-hounds of the media can give him the respect and the privacy he'll need to make a full recovery. Watching the poms pull off the greatest rope-a-dope in history would be a great way to start
