The Bundesliga side have requested to be kept informed about the Englishman’s status at Old Trafford, with the out-of-favour winger seen as a potential replacement for Chelsea-linked Jamie Gittens, according to Sky Sports.
Sancho impressed during his loan spell at Dortmund last season, playing a key role in their run to the Champions League final against Real Madrid.
Nevertheless, the clubs failed to agree on a permanent deal, and he ended up joining Chelsea. His first year at Stamford Bridge was frustrating overall, but he did cap it off on a high note by scoring in their Europa Conference League final win over Real Betis.
If Borussia Dortmund ramp up their interest, they could re-sign him in time for the Club World Cup.
