Manchester United fans got treated to an attacking spectacle at Old Trafford as their heroes put Barnsley to the sword in a 7-0 win. Progression to the next round of the Carabao Cup has been secured in style and in a win of this magnitude, there are bound to be many heroes. That was the case here, as Alejandro Garnacho continued his superstar leap, Marcus Rashford made it three goals in two, Antony returned from the wilderness, and Christian Eriksen also got a rare brace. However, all these players were at the club last season too. Of the five players United signed this summer, all four availa…