Chelsea are set to win the race to sign Portuguese star Jose Bosingwa after agreeing a deal with Porto.
The Blues have struck a deal worth 20.5million euros (£16.2million) with Porto and the player has flown to London for talks and a medical.
Porto announced a deal was done in a statement to the Portuguese Stock Exchange: "We inform the market that we have an understanding with Chelsea for the rights to our player Jose Bosingwa for the price of 20.5million euros.
"More information on the relative agreement of the transfer will be legalised once the player concludes the medical examinations that he is now having with the permission of Porto football club."
Chelsea also confirmed a deal was in place and he would sign subject to a medical.
The player's agent Jorge Mendes has accompanied his client as Chelsea look to seal the deal in the next 48 hours.
Manchester United, Liverpool and Aston Villa have all made moves for the 25-year-old in recent months but it appears Chelsea have held them off to land the highly-rated full-back.
Bosingwa, who has been at Porto for five years since joining from Boavista, will have his sights set on becoming first-choice at Stamford Bridge.
Fellow countryman Paulo Ferriera and Brazilian Juliano Belletti are the other options to play at right-back for coach Avram Grant, while midfielder Michael Essien has also been used there on occasions.