Chelsea have announced the signing of left-back Pep Chavarria from Rayo Vallecano. Chelsea have paid an initial £16.3 million for the left-back, with a further £1.7m to be paid in add-ons. AdvertisementAdvertisement AdvertisementChavarria is a solid option for ChelseaChavarria is an option at left-back or left wing-back Alonso's system. He is an accomplished defender who uses his low centre of gravity to avoid being beaten by all means possible. Chavarria will have to get up to speed quickly to impress Alonso, who pushed strongly for Chelsea to sign him.