His leadership, work-rate, communication, and dedication to the defensive half are integral reasons for our success; the cover he provides the back four will be missed particularly dearly against this Dortmund side. Arteta will do his best but he simply isn't a true DMF with teeth....I'm sure Wenger will tell Ramsey to sit back more than he has been but he always has had a tendency to drift forward. If we get caught out vs the Dortmund attack, they will make it costly.