By Tom Gott Mason Greenwood met with Manchester United officials at the club’s Carrington training ground on Monday amid reports that former Champions League winners Marseille have made a move to sign the 22-year-old. Greenwood is back at United this summer after his loan with Getafe expired, but he is not expected to be re-integrated into the squad and is instead available for transfer as he enters the final 12 months of his contract. United held their first day of pre-season training on Monday and Greenwood was present at Carrington, but The Athletic note that the striker did not train and i…