Jose Mourinho has discussed Juan Mata's reaction to not being in Chelsea's squad and challenged the Spaniard to use an upcoming League Cup game to make himself a first-choice player.
Source: Mourinho: I'd love Mata to prove me wrong (http://www.fifa.com/worldfootball/clubfootball/news/newsid=2178483.html?cid=rssfeed&att=)
Then Mata should try as much as possible to do that too! He needs to really prove him worng!