AMR) Willian
Cost: £32m (via Mail Online)
For a while it seemed the Brazilian was heading to either Tottenham or Liverpool until Mourinho swooped in with an unbelievable offer.
AML) Angel Di Maria
Cost: €25M (via Telegraph)
Has since moved from Real Madrid to Manchester United, but Mourinho shelled out €25M for the winger from Portuguese side Benfica after the 2010 World Cup.
ST) Diego Costa
Cost: £32m (via Sky Sports)
Mourinho’s joint biggest transfer to date, eclipsing Andriy Shevchenko who cost £2m more, brought in to score the goals and fire the Blues to a first league title since 2010 and is on course to do exactly that.