Chelsea have requested specific fitness reports on Douglas Costa as they ponder a £20million summer transfer bid, reports The Mail.
Jose Mourinho is a long-term admirer of the Brazil international and has had Chelsea scouts watch him extensively over the past 12 months. He is keen to make him the latest Brazilian to call Stamford Bridge his home, but has some serious concerns around him fitness.
Costa, 24, has struggled with a long-standing knee issue and Mourinho is seeking reassurance before committing to a concrete offer. The Chelsea boss has requested regular updates on the attacking midfielder's fitness and will swoop if he is satisfied.
But Chelsea are not the only club monitoring the situation. The same report claims Arsenal have sent scouts to run the rule over Costa several times. Arsene Wenger currently has a host of options in the advanced areas of the pitch, but uncertainty around Theo Walcott's future could spark their interest.
Manchester United and Liverpool are also in the mix with both Louis van Gaal and Brendan Rodgers looking to add the dynamic attacker to their rosters. Louis van Gaal has the financial power to outgun Liverpool, Arsenal and Chelsea, but Costa has his heart set on a move to west London.
Leaning towards Chelsea
The Brazilian international, who was in London over the weekend to face Chile at Arsenal's Emirates Stadium, has previously stated his desire to move to Chelsea. Those comments leave Mourinho as the favourite to land his signature when the transfer window reopens.
Barcelona and Real Madrid are also interested, but Costa is believed to prefer a move to the Premier League. Thanks to a duel nationality with Portugal, he will bypass the need for a work permit.
Costa would give Mourinho another option in the central-attacking areas, but would be a strange addition considering the arrival of Juan Cuadrado in the summer transfer window. The Colombian has barely been given a chance to impress at his new club but Mourinho is still looking to further increase the competition.
The Shakthar Dontesk star thrives in the right-midfield position, but can also play in the centre and on the left. He could provide competition for Oscar in the coveted No.10 position, but would need time to adapt to playing exclusively in the centre.
Do Chelsea really need another attacking midfielder or should Jose Mourinho be prioritising other areas? Give us your thoughts in the comment box below!