"I feel indebted to him because he's the coach that most trusted in me, most wanted me, who made me feel I could perform at the highest level", Morata said in April.
Chelsea target Tiemoue Bakayoko has arrived in the United Kingdom ahead of his move to Chelsea.
The tweets have since been deleted, but given his location, it is unsure at this stage if Bakayoko was innocently paying respect to his current club Monaco, with whom he won Ligue 1 with last season. It emerged that Bakayoko's £35million move from Monaco had been held up by a knee injury that required surgery at the end of last season and a disagreement over the payment structure of the fee. He enjoyed a meteoric rise to prominence at Monaco last season after two years of being viewed as an unfulfilled talent, and he only earned his first worldwide cap for France in March.
Chelsea are now reluctant to sell the Serbian to Jose Mourinho after he hijacked their move for Romelu Lukaku.
They claim that the midfielder will jet into England this week to complete his medical before finalising a deal to become only Chelsea's third summer signing.
Nemanja Matic and Diego Costa appear likely to miss Chelsea's pre-season tour as negotiations take place over their possible exits.