Chelsea left-back Filipe Luis has completed his return to Atletico Madrid.
The Brazil international cost the Blues £16.4m when he arrived from Atletico 12 months ago to replace Ashley Cole.
But he made only nine Premier League starts, with 26 appearances in all competitions, as he found himself unable to dislodge Cesar Azpilicueta.
A move back to Atletico had been rumoured for most of the close season, with Jose Mourinho confirming last week that the club were in the market for a left-back.
Chelsea are now expected to open talks with Augsburg for 21-year-old Ghana international Abdul Baba Rahman.