Chelsea boss Maurizio Sarri has accused Bayern Munich of being disrespectful and unprofessional in their pursuit of Callum Hudson-Odoi.
Sarri is unhappy that the German club spoke publicly about his player following their £35million bid for the 18-year-old forward.
Bayern's director of sport Hasan Salihamidzic said 'we really want to sign him' and Sarri hit out at the Bundesliga side on Friday.
'It is not professional because they are talking about a player under contract with Chelsea so they didn't respect our club,' Sarri said.
'Then I don't know what to say. I don't know the situation. I am happy with the player because he is improving, improving a lot in the defensive phase.
'Now he needs to improve in some movements without the ball but he is working very well at the moment so I am very happy with the player and would like to have him in the future.'
Sarri wants Hudson-Odoi to stay at the club, who have offered the youngster a new deal. He has 18 months left on his current contract.
Chelsea face Newcastle at Stamford Bridge on Saturday and Hudson-Odoi could feature.
Sarri, who celebrated his 60th birthday on Thursday, said he recommended Chelsea need to recruit two players, but declined to say their positions.
He said: 'As you know very well I am not involved in the market. I spoke with the club and the club knows very well my opinion. In my opinion we need two players.
'Then it depends on the club decision. I don't know anything about the market day by day or minute by minute.'
Sarri will not face FA questions regarding VAR comments on Tuesday, when he said the officials don't know how it works.