Manchester United loanee Jadon Sancho immediately asked about one current Borussia Dortmund teammate after his sensational return to the German club this week. Sancho’s turbulent season at United came to an end on Thursday after the Bundesliga outfit reached an agreement to sign him on loan until the end of the season. The 23-year-old United outcast hasn’t played regular first-team minutes since last August and was frozen out at Old Trafford over his spat with manager Erik ten Hag. Dortmund have paid United a £3m fee for the loan and the club will have to pay a further £3.4m if certain add-ons…