Atletico Madrid have loaned Spanish midfielder Oliver Torres to FC Porto for a season-and-a-half, both clubs confirmed on Thursday.
The 21-year-old returns to the Dragoes where he started in 28 games while on loan from Atletico in the 2014-15 campaign.
"Our club has reached an agreement with Porto for the loan of Oliver Torres to the Portuguese team," Atletico said in a statement. "The club wishes the player the best of luck in his new professional chapter."
A youth product of Atletico, Oliver returned to the Vicente Calderon last summer after his successful loan spell at Porto.