5. Kurt Zouma (2013) The central defender was allowed to stay at St Etienne for the remainder of the 2013/14 season after signing for Chelsea for £12m. Almost went out on loan against the following campaign, but has become an important member of Mourinho’s team and is now arguably ahead of Gary Cahill as one of Jose Mourinho's first-choice defenders. Picture: GETTY IMAGES

Credit : GETTY IMAGES