By Grey Whitebloom & Toby Cudworth “It’s a good day,” Jadon Sancho said, mostly to himself, as he leant back in his chair after officially rejoining Borussia Dortmund on loan in January. “A good day.” Two-and-a-half years after leaving the Bundesliga for an ill-fated spell at Manchester United, Sancho’s return to the Ruhr region has been hailed as a move with no downsides. In Italy, they like to say that reheated soup never tastes as good. Clearly, the message does not translate to Germany. Sancho’s last senior match of 2023 came in August before he was left out of United’s squad for a trip to…