PHOTO: Duke's Jontavis Robertson is gang-tackled after a 4-yard reception. By TOM SHANAHAN Duke’s promising season-opening loss to Notre Dame now seems like it was played in an alternative universe. In a COVID-19 Twilight Zone college football season, that’s not unusual, but it is cause for alarm for a lost season. Duke dropping to 0-3 in three ACC games with Saturday’s 38-20 loss at Virginia has the Blue Devils almost a third of the way through their pandemic-revised…