Danny Man United returns to Old Trafford for FA Cup sixth-round tie . Arsenal Striker left Welbeck on deadline day in £16m deal . Louis van Gaal said he was not good enough for the United first team . The England forward started his career at the Emirates positively . But he has struggled with form and injury in recent months . Olivier Giroud 's purple patch has left Man United stuck out on the wing . CLICK HERE for Man Utd vs Arsenal team news and probable line ups .
Danny Welbeck returns to Old Trafford for FA Cup sixth-round tie . Arsenal Striker left Man United on deadline day in £16m deal . Louis van Gaal said he was not good enough for the United first team . The England forward started his career at the Emirates positively . But he has struggled with form and injury in recent months . Olivier Giroud 's purple patch has left Welbeck stuck out on the wing . CLICK HERE for Man Utd vs Arsenal team news and probable line ups .