Chelsea are being kept updated on Douglas Costa 's fitness ahead of a £20million summer swoop . The Brazil international is a long-term target of Jose Mourinho , who is keen to bring the Shakhtar Donestsk midfielder to Stamford Bridge . And the Blues will revive their interest in the 24-year-old ahead of next season provided they receive assurances over a long-standing knee concern . Brazil international midfielder Douglas Costa is a long-term target of Chelsea and Jose Mourinho . Mourinho and Chelsea are receiving fitness updates about Costa as they want assurances about a knee injury . Costa ( left ) has also reportedly caught the attention of Real Madrid , Barcelona , Arsenal and Liverpool . Chelsea are being regularly updated on Costa 's fitness and will press ahead with a move if they are satisfied with the joint in question . Costa will spark a transfer scramble this summer with Shakhtar Donetsk ready to sell their prized-asset . Shakhtar chiefs are now open to selling Costa and talks with third parties over his departure are underway . The Ukrainian side hope to spark a bidding war for the midfielder in attempt to maximise his transfer fee , with a starting price of £25million . Costa is open to joining a Barclays Premier League club , but wants to be playing Champions League football . However , a host of Europe 's top sides will also be in the running to land Costa this summer , Real Madrid and Barcelona among them . Costa ( left ) plays for Brazil but has dual Portuguese nationality , lowering fears of work permit issues . Costa is said to be open to moving to the Premier League but wants to join a club in the Champions League . Costa could make the switch from Shakhtar Donetsk to Stamford Bridge for £20million . Arsenal have had Costa watched extensively , while Manchester United and Liverpool have both been linked with a move . But Chelsea are set to lead the charge having tracked the Brazil international for two years . Despite playing for Brazil , Costa has dual Portuguese nationality so should not face work permit issues .
Shakhtar Donetsk midfielder Douglas Costa is a long-term Chelsea target . Chelsea want assurances about a long-standing knee concern . Costa is also a target for Real Madrid , Barcelona and Manchester United . TL;DR The Premier League champions have been linked with several players this summer including Chelsea's John Terry.