By Sean Walsh Oh, Premier League football, how we have missed you. The Barclays is back, and the new season kicked off in vintage style – with Manchester United grabbing victory late in the day. The Red Devils downed Fulham on opening night, thanks to a last-gasp strike from new-boy Joshua Zirkzee. But there were plenty of thrills and spills both before and after the game’s opening goal. Here’s how social media reacted to Friday’s game at Old Trafford. Before kick-off, United confirmed there would be only one debutant in their starting lineup, with Noussair Mazraoui coming into their XI. Unite…