The Blues have splashed the cash for the former Fiorentina defender, but can he now justify his cost in Antonio Conte's starting XI?
Chelsea manager Antonio Conte has completed his fourth signing of the summer with Marcos Alonso arriving from Fiorentina on deadline day for 23 million pounds ($30.20M), and we take a look at how they could line up with the defender in the side.
The Italian has enjoyed a perfect start in the Stamford Bridge dugout but had been forced to field the same back four in every match, prompting him to express concerns about a lack of numbers at the back.