Rakitic has agreed personal terms with Barca, but a fee with Sevilla is yet to be settled.
The Croatia international is sure to move to the Nou Camp, with only a year to run on his current Sevilla deal, but Barca do want talks to be settled amicably.
Estadio Deportivo says Barca have accepted Sevilla's request to include Tello in the operation and now everything hinges on the winger agreeing personal terms.
Tello's agent is due in Seville today for contract talks with Sevilla officials.
For the big stories and the banter follow us on Twitter: @tribalfootball