Many players have tried and failed at Manchester United during the post-Sir Alex Ferguson era. But few have failed quite as spectacularly as Alexis Sanchez, signed in early 2018 and unveiled to a video playing a piano at Old Trafford. Sanchez signed for Manchester United from Arsenal in a swap deal with Henrikh Mkhitaryan which benefitted neither player, nor club. This past year the pair have been teaming up at Inter Milan, winning the Serie A title and turning back the clock. Sanchez, 35, has not quite matched his heroics at Marseille last season where he scored 16 goals. He has contributed f…