Regarding the transfer of Cucurela from Chelsea, it has just been reported that Manchester United has sent an offer to Chelsea to bring in Cucurela on loan and the result is now that Manchester United has reached a personal agreement with Cucurela, but now the decision remains in Chelsea's hands whether they want a loan fee of 2 million pounds for a season.
Luke Shaw's injury has put Manchester United in a crisis in left back with his injury. It make sense that they want to sign Cucurella who has a similar playing pattern with Luke Shaw who can run up front and provide reasonable assist for players to finish. Maybe Chelsea may not want him to go to a rival club just like Arsenal that refused selling Emile Smith Rowe to Chelsea who they consider a direct rival to them in the premier league this season.
https://www.dailymail.co.uk/sport/football/article-12457343/Arsenal-Chelsea-Emile-Smith-Rowe-Mauricio-Pochettino-transfer-window.htmlIf Chelsea offer a lot of money, Arsenal may change their mind.