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Atletico Madrid are hoping to sign Chelsea playmaker Juan Mata on loan for the season, according to Spanish sports daily Marca.
The Spain international could be allowed to leave Stamford Bridge following the arrival on Willian, as Jose Mourinho is now overloaded with attacking midfield options.
Atletico Madrid have extended the contract of key forward Diego Costa by three years until June 2018.
The Brazil international has developed into one of the most exciting players in Europe over recent seasons and had been linked with a move to Liverpool.
Atletico Madrid have confirmed the signing of goalkeeper Daniel Aranzubia on a season-long contract from Deportivo La Coruna.
The 33-year-old passed a medical late last night and will now join Diego Simeone's squad, serving principally as back-up to Thibaut Courtois.
Atletico Madrid have reaffirmed their commitment to keeping hold of Diego Costa despite interest from Liverpool.
– Atletico's sporting director Jose Luis Caminero speaking to AS
Diego Costa is a very important player for Atletico, we value him very highly and we are convinced that this year he is going to score a lot of goals with Atletico. He is an idol for the fans.
Diego Costa insists he is happy at Atletico Madrid amid interest from Liverpool in his services.
– Atletico Madrid striker Diego Costa speaking to AS
I'm well here, I'm happy here.
As I've been in Argentina and Uruguay I've not heard anything about this.
I'm happy here, if the club want me to be here, I'm going to be here.
I think that the coach (Diego Simeone) counts on all of us, not just me. He knows how important it is to maintain the squad, the fans know it as well.
Atletico Madrid president Enrique Cerezo has described newspaper reports linking his club with a move for Arsenal midfielder Santi Cazorla as "invented".
– tletico Madrid president Enrique Cerezo speaking to Marca
We have no news of Cazorla. These are invented stories that are made up every day.