Chelsea is close to a £23.3 million with add-ons agreement with Fiorentina for Juan Cuadrado.
Cuadrado was initially considered a target for next summer.
The forward himself made his desire to move to Stamford Bridge clear early in the talks.
“He has the characteristics suited to English football because he’s fantastic in positive transitions and with Mourinho it could be perfect,” said the Fiorentina coach, Vincenzo Montella.