Ever since Jose Mourinho returned to Chelsea, Juan Mata has struggled to hold down a place in the Blues' starting line-up.
Mata joined Chelsea in August 2011 for £23.5m from Spanish club Valencia. He had an instant impact on Chelsea's attacking performance.
Mata finished his first season at Stamford Bridge with 573 passes, creating 66 chances and completing 61 successful crosses, which all contributed to Chelsea's cup-double winning season. He finished the Premier League season with 13 assists and six goals, and was voted Chelsea's Player of the Year.
The Spaniard played brilliantly in his second season as well, winning Chelsea's Player of the Year again and cementing his place as one of the best attacking midfielders in the Premier League.
However, this season he has fallen down the pecking order, with Mourinho preferring Brazilian duo Oscar and Willian. Chelsea have suffered creatively, and the Stamford Bridge faithful want to know why their beloved Mata has not been playing.
Chelsea essentially play a False 9, with players not sending in many crosses for the striker to attack.
A False 9 should be supported with a defensive midfielder, but the fact that a striker is utilised means that the whole system is effectively wasted. It is in this situation that Chelsea need Mata to deliver clinical and incisive passes to set up his teammates to up for goalscoring opportunities.
With Mata's talent, it is no surprise that many clubs will be looking to cash in as he is feeling unsettled. French giants Paris Saint-Germain are said to be interested.
Mourinho must ensure that Mata remains a Chelsea player.
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