Chelsea boss Jose Mourinho is planning a summer swoop for Atletico Madrid midfielder Koke . The club 's technical director Michael Emenalo travelled to Spain on Saturday to watch the 23-year-old during Atletico 's 2-1 victory against Deportivo , according to Spanish newspaper AS . The highly-rated Spaniard signed a long-term deal with Diego Simeone 's side only last year , but Mourinho is reportedly planning to offer second-choice left-back Filipe Luis to his former club as a makeweight for the deal . Chelsea boss Jose Mourinho could be planning a summer swoop for Atletico Madrid midfielder Koke ( above ) Spanish newspaper AS report that Mourinho could offer Filipe Luis in a part-exchange deal this summer . Luis has struggled to make an impact at Stamford Bridge this season after failing to displace Spanish defender Cesar Azpilicueta from the left-back spot . AS also report that Koke 's release clause is around £50million which Chelsea could be willing to shell out as Mourinho looks to add to a midfield that has looked tired at times this season . Koke , an Atletico academy graduate , was instrumental as the club reached the final of the Champions League before losing to local rivals Real Madrid last season and has . Koke in action during Atletico 's 2-1 La Liga victory against Deportivo on Saturday . Chelsea defender Filipe Luis ( right ) could be set for a move back to his former club .
Jose Mourinho reportedly targeting summer move for Atletico Madrid 's . Spanish midfielder has been key to Koke recent success . Former Atletico defender Filipe Luis could be going back to Spain .