Greenwood the former player of Manchester United had a bad drama during the time he was playing on this team and that's why he left Manchester United and started playing on Getafe to be out of the negative atmosphere of Manchester United. Greenwood is even close to return Manchester United but since he didn't have good times there, he prefers to play for another team instead of Manchester United.
Manchester United wants to give this player to Atletico Madrid and get Felix instead of him. I think since he already played in La Liga in the last season this cannot be a bad idea for him to play in the Atletico Madrid for the next season and stay away from Manchester United.