straight to your inboxManchester United plan to continue developing Mason Greenwood, Marcus Rashford and Anthony Martial as an attacking trio amid frustration in their attempts to sign Jadon Sancho.Greenwood, Rashford and Martial scored 62 goals between them last term and Greenwood, 18, became the fourth teenager to score 17 goals for United in a single season after George Best, Brian Kidd and Wayne Rooney.United earmarked the right wing as their priority position for this transfer window but