Chelsea have reportedly rejected a £50m offer from Barcelona for Brazilian winger Willian.
According to the Mail, the 29-year-old's representatives have been in Barcelona and had discussions with Blaugrana chiefs.
But Chelsea are understood to have no interest in letting him leave.
The Camp Nou side claimed a LaLiga and Copa del Rey double last season, almost going unbeaten in the process, however manager Ernesto Valverde still seems to have concerns surrounding his squad's depth and attacking flair.
This was highlighted during their stunning Champions League quarter-final defeat to Roma.
The Spanish side see the Willian someone who can add to their attack and want him to link up with his countryman Philippe Coutinho, following the departure of Andres Iniesta.
Manchester United have also expressed a strong interest in the skilful wideman and attempted to sign him in January, however this move was resisted by Chelsea while he was in a strong run of form.
Mourinho is known to have a close relationship with Willian as he was one of the only players performing to the best of his ability during Chelsea's woeful 2015/16 campaign
His performances dropped off at times in the latter part of the season, though the Stamford Bridge hierarchy still appear reluctant to let Willian leave.