It was all smiles at the training ground as Ruben Amorim introduced himself to his Manchester United charges this week. Strolling around and shaking hands – his t-shirt and puffer jacket combination and slicked back, naturally wavy hair would not have looked out of place on the catwalk, let alone Carrington – the self-assured swagger Ruben Amorim displayed during four extremely successful years at Sporting has been palpable ever since he stepped out of that taxi on Monday afternoon. And the grins and hugs he was greeted with, the likes of Kobbie Mainoo and Mason Mount quite literally embraced …