Atletico Madrid have confirmed the signing of Stefan Savic from Fiorentina on a five-year contract.
Savic, 24, underwent a medical at the Vicente Calderon stadium on Monday before completing formalities on the deal.
"I'm delighted to be here and to be a part of this great club," he told the club's official website. "I'm ready to begin my new experience with Atletico.
"I hope I can achieve success and win many titles for this club. Perhaps this is the main reason why I left Florence."
Stefan Savic is now an Atletico! ;) He has signed for 5 seasons after undergoing the medical tests #WelcomeSavic pic.twitter.com/q1iVhizb9z
- Atleti English (@atletienglish) July 20, 2015
Savic, who was under contract with Fiorentina until June 2019, arrived at the Serie A side three years ago from Manchester City and made 28 league starts in the 2014-15 season.
The Montenegro international joins an Atletico side who finished third in La Liga during the last campaign and will play in next season's Champions League.
"This is a great team," Savic said. "Atletico play with a lot of intensity and have very good players that have proved their qualify by winning La Liga and reaching the final of the Champions League (2014).
"It's a great team and I think each day it will become better. I tell the club fans to continue to believe in this team as they have always done.
"I will try to give my best to defend the Atletico jersey. I hope to play well and for the team to win, this is the most important thing.
"[Atletico Madrid coach] Diego Simeone is the best coach in the world and I'm happy to work with him."
Atletico sporting director Jose Luis Perez Caminero said: "Savic is a player with an enormous projection and he has a great future ahead of him."
The Spanish press have reported that, as part of the deal that will bring Savic to the Vicente Calderon, Atletico midfielder Mario Suarez will move the opposite way -- although as yet neither club has confirmed such an agreement.
Suarez made 11 league starts for Atletico in the recently concluded campaign and is willing to leave the Rojiblancos in search of more playing time.
Savic believes Suarez will be an important signing for Fiorentina.
"Suarez is a great player,'' he said. "He is going to Fiorentina and I'm sure that he will help them achieve success.''
Information from the Press Association was used in this report.