Chelsea have already got their first signing of the summer on board and will likely have a busy summer on the transfer front. The Blues have snapped up Tosin Adarabioyo on a free transfer to replace Thiago Silva, who has returned to Fluminense on a free transfer. More incomings are expected, but Chelsea will also have to move some players on in order to trim down their squad and balance their books. And at this moment in time, they’re said to be in talks to sell one of their defenders, with Sky Sports journalist Dharmesh Sheth sharing an update on the matter. The player in question is Ian Maat…