I'm not sure Sky will go into Roubaix with a single leader. They'll go in with 3 or 4 like Quick-Step usually do I would think. You've got to simply keep as many riders at the front and hope bad luck, crashes & mechanicals don't eat them all up too early in the race. Wiggins has said today he's not leader, it's Thomas though, so maybe Wiggins is just going to try and TT from far out, the others will have to chase and Thomas & Stannard just have to stay with the leaders.