Kolkata, January 11: Chelsea are likely to file a complaint against Bayern Munich to FIFA if evidence of any tapping up is found against attacker Callum Hudson-Odoi or his representatives.
The English youngster has been a subject of interest from the Bundesliga champions and reportedly they have already made four bids, last in the region of £35m.
However, Chelsea have been outraged by the public nature of Bayern's pursuit, with sporting director Hasan Salihamidzic addressing openly this week that the German giants positively want to sign the 18-year-old.
Speaking earlier this week, Salihamidzic said: "He is a very interesting player we really want to sign.
"He has qualities that fit our game. He can dribble, he is fast, he moves well towards the goal. He is a young player who has great potential to evolve.
"I see in him a really good player who would certainly be a good face to join us."
Premier League rules prohibit such public comment although as per FIFA regulation Bayern have not broken rules. And Chelsea now believe Bayern have co-ordinated their efforts with Hudson-Odoi's camp to get him out of Stamford Bridge, though they accept it would be difficult to prove the potential accusations of "tapping up".
Chelsea do not want to sell one of their best hot prospects from the academy but with the youngster reluctant to sign a new deal, which ends in 2020, Maurizio Sarri's side may have to eventually set him free.
Odoi was handed his first-team debut last season under former boss Antonio Conte and during the pre-season, he also seemed to have impressed new boss. But apart from giving him a rare start in the Community Shield, he has only managed to make one single appearance in the Premier League.