Diego Costa has finalised the terms of his move back to Atletico Madrid from Chelsea, both clubs have confirmed, with his registration to come into effect on January 1, 2018.
Atleti agreed a deal worth up to a reported €60million to re-sign Costa last Thursday, the switch subject to a medical and personal terms being agreed with the 28-year-old striker.
Diego Simeone's side are banned from registering new players until the new year, but the Argentinian will have Costa at his disposal from January.
Costa was quoted by Atleti's official website as saying: "I am very happy to return to my home. I have always said Atletico is my home. I am very, very, very happy."
Costa, who scored 63 goals in his first spell in Madrid and will wear the number 18 shirt, will doubtless be eager to make an impression once he is available to return to action, having been frozen out at Chelsea following a fall-out with Antonio Conte.
Having claimed in June that Chelsea boss Conte had told him via a text message that he was free to leave, Costa subsequently refused to return to training with the Premier League club, instead remaining in Brazil as he accused his team of treating him "like a criminal".
Conte laughed off the comments and said he would not pick the striker even if he made himself available, having signed Alvaro Morata from Real Madrid to become his first-choice forward.
However, after a deal with Atleti was agreed last week, Conte did acknowledge the achievements of a player who was Chelsea's top scorer in each of his three seasons in England, finding the net 59 times in 120 appearances.
"We want to thank him for what he did with this club," said the Italian. "We wish him all the best for the future. I don't forget that we won together last season."
In a statement on Tuesday, Chelsea thanked Costa for his efforts and wished him well for the future.
He leaves Chelsea having won two Premier League titles, and the 2014-15 League Cup.
|Selfie or stitches? Ronaldo bloodied after Madrid brace|
|Heynckes hails Bayern win: This is what sets us apart|
|Southampton 1 Tottenham 1: Kane earns visitors a point|
|Silva assured of chances at AC Milan after latest first-team snub|
|Saracens scrape into Champions Cup last eight|
|Goretzka´s Schalke return marred by abuse|
|Real Madrid 7 Deportivo La Coruna 1: Seven-up for Zidane´s men as Bale shines|
|McIlroy ´in really good shape´ after Abu Dhabi return|
|Muller brings up 100 Bundesliga goals in Bayern win|
|Dimitrov places Kyrgios among tennis´ most talented after Melbourne classic|
|Bayern Munich 4 Werder Bremen 2: Lewandowski & Muller at the double to spare champions´ blushes|
|Do Arsenal or Man Utd get the better deal? Sanchez v Mkhitaryan in Opta numbers|
|Edmund: I can win Australian Open|
|Pele ´fine´ and in ´no pain´ after reported health concerns|
|Dimitrov can go all the way, claims Kyrgios|
|Dominant Wozniacki sets up Suarez Navarro showdown|
|Brilliant back nine sees Fleetwood retain title|
|Surgery pushes Pocock´s Brumbies return back three months|
|No mercenary? Sanchez endorses article defending imminent Man Utd move|
|Allegri expects Buffon to be ´fully recovered´ within a week|
|Atletico Madrid confirm Costa hamstring injury|
|Thisara stars as Sri Lanka stay alive in tri-nation series|
|Atalanta 0 Napoli 1: Mertens ends drought to keep visitors top|
|Nadal through to meet Cilic as Dimitrov downs Kyrgios|
|Dimitrov holds off Kyrgios as wait for home champion goes on|
|Alexis Sanchez boards plane ahead of reported Man United medical|
|Smith not sour over controversial dismissal|
|Buttler the difference for England, says Morgan|
|Hamburg dismiss Gisdol after fourth loss in a row|
|Brilliant Buttler century sets up England series win|
|Melbourne City 5 Adelaide United 0: Budzinksi & Vidosic braces inspire emphatic win|
|Marco Silva sacked by Watford following ´significant deterioration´|
|Nadal promises greater aggression in the last eight|
|Deschamps knows my thoughts - Lucas Hernandez hints at France decision|
|Nadal battles past Schwartzman in Melbourne|
|Wozniacki: I have nothing to lose|
|Impey claims historic Tour Down Under win|
|Rockets end Warriors´ 14-game road winning streak|
|Klopp: Liverpool wouldn´t sell to rivals during season|
|Spence retains IBF welterweight title with TKO of Peterson|
|Wozniacki cruises into Australian Open quarter-finals|
|Giggs keen to help Bale overcome injury woes|
|Harrison key to containing ´monster´ Fournette|
|Klopp in no rush to replace Coutinho|
|Cook leads, Rahm in contention in California|
|Cavaliers booed after abysmal first quarter|
|Titans hire Mike Vrabel as new head coach|
|Brive deny Worcester after stadium swap|
|Malcom dreams of Premier League but remains unsure of future|
|Guardiola sets target of 10 wins to guarantee title|
|Championship Review: Millwall break Leeds hearts in seven-goal stunner as Wolves lose|
|Messi and Pique welcome Coutinho to Barcelona training for first time|
|Thauvin ´very happy´ at Marseille|
|Guardiola salutes ´outstanding´ Manchester City|
|Saracens still not safe, Scarlets battle through|
|Watford still battling relegation from the top half, insists Silva|
|Rondon ´devastated´ after Everton´s McCarthy suffers horror injury|
|Aguero´s perfect hat-trick is Argentine´s 11th for Manchester City|
|Moyes impressed with Hammers display despite being held by Bournemouth|
|Dyche annoyed with Burnley´s ´big six´ results|
|Manchester City 3 Newcastle United 1: Aguero hat-trick sees pacesetters bounce back|
|Everton fans´ frustration understandable, says Allardyce|
|Wenger responds to Dortmund criticism over Aubameyang affair|
|Bordeaux appoint Poyet as new boss|
|Serena Williams: I can´t figure out a stroller!|
|Lee reigns supreme again as Cheetahs crush Southern Kings|
|Mourinho frustrated at United failure to ´kill´ Burnley|
|Simeone reveals Costa knock as Atletico bemoan dropped points|
|Lambert upbeat over Stoke´s quality after debut victory|
|Nothing happening with Aubameyang - Wenger|