The Blues are still interested in making more moves after adding Oriol Romeu.
Mata has made 129 appearances for Valencia and has managed to find the back of the net 33 times.
Alex has made 83 appearances for Chelsea and has scored seven times.
Having lost out on Javier Pastore to Paris Saint Germain, Chelsea are now rumoured to be considering a fresh bid for Tottenham's Croatian midfielder Luka Modric as well as Real Madrid star Kaka.
Karim Benzema has scored 60 goals in 23 games.
FIFA 12 will include an enhanced Player Impact Engine, Tactical Defending and Precision dribbling.
More transfer talk about the North London club.
Lionel Messi, Cristiano Ronaldo and Xavi Hernandez have been shortlisted for the new UEFA Best Player in Europe Award.
Arsene Wenger needs an upgrade at central defender and forward, but might lose his two most prized midfielders.
David Beckham on Sunday instructed his solicitors to approach Scotland Yard and find out whether his name is on a list of almost 4,000 possible victims contained in notebooks belonging to the private investigator Glenn Mulcaire.
After securing the signatures of Gervinho and Carl Jenkinsson, Arsenal continue pursuing a defender and an attacker, although their primary focus is to persuade Samir Nasri and Cesc Fabregas to stay.
Chelsea's pursuit of Porto striker Radamel Falcao has come to an end after the Colombian extended his contract with the Portuguese champions.
Manchester United are on the verge of completing the sensational signing of Inter Milan midfielder Wesley Sneijder, after agreeing personal terms with the Dutchman.
A look at the English Premier League transfer rumours
The Brazilian forward has shown potential.
Real Madrid needs another forward.
Inter Milan star Wesley Sneijder reportedly set to sign for Manchester United by the end of week for a club record £35million deal.
Real Madrid manager Jose Mourinho has said they are looking to sign one more attacker, with Carlos Tevez linked with the Spanish giants, although Chelsea defender Alex could also make the move to Santiago Bernabeu.
Arsenal and Liverpool have been warned off Valencia star Juan Mata after the Spanish club president president Manuel Llorente adamantly stated that the in-demand winger will not be leaving the club this summer.
Reports suggest that Manchester United are continuing their pursuit of Inter Milan midfielder Wesley Sneijder as they look to sign a fourth player in this season's transfer market.
The young Brazil star is trying to prove he deserves the hype
With the European clubs all scheduled to return for pre-season training, here is a list of all the fixtures of the big-clubs till the start of the new season in August. Despite being friendlies, there are some eyecatching fixtures, including a repeat of last season's champions league final between Barcelona and Manchester United.