Indeed, there won't be a huge change for DC (at least, not a big negative one) but it must feel weird having your second singles player wandering around, knowing he won't have a coach after this week.
As I believe Lee mentioned in the Ferrero forum, maybe it will do Michel good to have someone on court with him, coaching him during the match. Hopefully Mark can work his magic (please oh please oh please), or LOL they could get Roger to sit on court with him

I think Roger could be a great motivator
