Clubs agree a price for the player, but Besiktas want to sign him on loan with a view to a permanent move, while Chelsea want to sell him outright this summer.
Turkish club Besiktas are keen to sign Chelsea forward Demba Ba on loan, according to The Mirror.
Chelsea are willing to part with the 29-year-old Senegal international, who has scored 14 goals since moving to Stamford Bridge from Newcastle United in a £7m switch in January 2013.
However, the Blues want to sell him permanently, while Besiktas are keen to take him on loan initially.
Despite their disagreements on the structure of the deal, the clubs have managed to agree a transfer fee in principle, which Besiktas president Fikret Orman claims is below £10m.
Orman is quoted as saying: “Demba Ba is an excellent player and we have been in talks with Chelsea for a long time. Chelsea initially wanted £10m for Ba, but we have negotiated a price we are happy with.”
Besiktas are reportedly willing to cover the majority of Ba’s £80,000-a-week wages.
Ba appears to be surplus to requirements at Chelsea following the arrival of Spain frontman Diego Costa from Atletico Madrid, while the Blues are also looking into the possibility of re-signing Didier Drogba as a player-coach.
Representatives from Besiktas are already in England, as the Istanbul club are in the UK on a pre-season tour.
Besiktas lost 2-1 to Wigan Athletic on Tuesday.