#3 Daniele Rugani (Juventus)
Chelsea have already been linked with a move for Rugani this summer, with some suggesting that he may be about to move to Stamford Bridge in a deal worth around £40 million. Again, like Koulibaly, it will have to mean that one or two defenders have to go out the door, with David Luiz most likely.
Rugani is 23 now, and he may feel that it is time to move on from Juventus. He first moved to Juve in 2013, and after two seasons on loan at Empoli, has spent the last three years as part of the first team in Turin. However, he has never really established himself in the side. He is an excellent defender. He is strong, good in the air, and reads the game excellently, as well as being able to play out of defence with confidence. It looks like he is behind Giorgio Chiellini, Mehdi Benatia and Andrea Barzagli in the queue for places at centre back, and he may feel that his best chance of regular football is away from the Allianz Stadium.