Alejandro Garnacho has given Erik ten Hag a simple decision to make at Manchester United

Another substitute appearance, another positive impact from Alejandro Garnacho.

It seems like the days of the super sub have come to an end in football. Top stars are so intent on playing every single minute that being named on the bench is more often than not taken as an insult rather than the tactical ploy it can be.

Sir Alex Ferguson once expressed his sympathy to Ole Gunnar Solskjaer as he couldn't start him in a match, even though he deserved it, because he was just so good at hurting teams after coming off the bench. "If I ever feel guilty about the teams I pick, it invariably centres around him. He really deserves better. But the fact is he is better than anyone else at the club as a substitute," the legendary manager said after Solskjaer had scored four times after being brought on in the famous 8-1 win over Nottingham Forest.

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So there should be no shame in being a substitute. Holding back on a dangerous weapon so it can be deployed at the most opportune moment is a smart tactic. A devastating one when used correctly. In a world where super subs are becoming rarer and rarer, Garnacho is somewhat of a throwback.

The starlet is quickly approaching half a century of games for Manchester United and is still just 19. A young, exciting winger from the academy is always going to garner excitement and it's of little surprise that Garnacho is already a firm fans' favourite. He might not have got the No.7 in the summer but No.17 is still a significant upgrade and makes it clear how entrenched he now is in the senior squad.

Garnacho has largely been used as a substitute by Erik ten Hag. The Argentine has