The ex-Blues who are making the best impression away from the Bridge
Chelsea may be topping the Premier League currently, but after some poor results in recent weeks they may wish they had some of these former players still available at Stamford Bridge.
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Here are the five ex-Blues stars who have been impressing the most this season.
5. Juan Mata, Manchester United
Initially struggled when he first made the then club record £37.1m switch to Old Trafford in January 2014, but since Louis van Gaal took charge as manager the Spain international has been revitalised.
With Angel di Maria injured Mata made the No.10 spot his own over the past few weeks and has a decent tally of five goals and three assists in 15 league starts this term.