Manchester United legend Roy Keane is not usually the type to hand out compliments willy-nilly. So while a penalty shoot-out defeat by rivals Man City in the Community Shield was not the birthday present the former Red Devils skipper was hoping for, the performance of one of Erik ten Hag’s key men at least gave Keane something to smile about as he turned 53 at Wembley. And if there were any concerns that Alejandro Garnacho would be a little sluggish after a busy summer – he was part of Argentina’s Copa America-winning squad alongside Lisandro Martinez – they were emphatically dispelled as the …