The squad number has been left vacant ever since Cristiano Ronaldo’s acrimonious exit from Old Trafford.
The kit with seven on the back is held in legendary status at Man Utd.
Ronaldo wore it across two spells at the club and it has been owned by other world-class stars such as David Beckhamand Eric Cantona.
Going further back, legends like George Best, Bryan Robson and Nobby Stiles also wore United’s most iconic number.
Anybody looking to claim it for next year will be hoping to become heroes rather than failures who donned the No7 like Angel Di Maria and Memphis Depay.
The winger was supposedly “stopped” from grabbing the number by Edinson Cavani.
Sancho wore seven on his back during his spell at Borussia Dortmund, which saw him score 50 goals and get 64 assists in 137 games
Perhaps a new number is the key to unlocking his best form after battling tough times at United.
The club could also look to the future and hand Alejandro Garnacho the No7.
He currently wears No49, which he was given while still a youth team player.
The Argentine is set to be awarded with a bumper new contract that sees him quadruple his current earnings and a better squad number could sweeten the deal.
An outside bet to take the shirt is Antony, who wore it during a brief spell at Sao Paulo.
However, the Brazilian’s preferred kit is the No11 although he wears the No21 currently.
Yet none of those players have an affiliation with it.