Utd will be stronger. They haven't finished spending yet. Last season they had Smalling, Jones, Carrick, Felllaini, Ibra at the heart of their team. I'm afraid that Bailly is going to be a great player for them. They might not be ready for the title, but I think they will be top 4. Chelsea look a mess at the moment, but I expect them to react to Lukaku loss by finalising deals for Sandro etc. They need a forward though. It wouldn't surprise me if they came in for Sanchez, or made a discrete enquiry. I think if sanchez goes anywhere this Summer though it will be to play for Pep.I can see united flopping again and Chelsea struggling without Costa, not to mention China, there will be enough interest in him to demand such a fee, hes still a world class player.