Chelsea were delighted with Tosin Adarabioyo for one big reason before making him their first summer signing. Chelsea announced this week that Tosin Adarabioyo, 26, is the club’s first signing of the summer window on a free transfer. The English defender will officially become a Blues player on 1 July and he’s penned a four-year deal at Stamford Bridge. We’ve seen Chelsea buy a lot of young and inexperienced players in recent windows, which is a strategy strongly criticised by some sections of the fanbase. However, Tosin has a tick by his name in terms of experience. The centre-back has spent …