The ex-United man has made a bold prediction about his former side on Twitter.
The Dutchman's side have endured a mixed start to their Premier League campaign, only winning once in five games and, most recently, surrendering a 3-1 lead at Leicester City to lose 5-3 at the King Power Stadium.
Neville, however, believes Man United will bounce back and has made a confident prediction despite their troubled start.
Indeed, the 37-year-old has backed his former side to be in the top four by Boxing Day.
Neville was tweeting as part of a Q + A with fans and answered questions on a variety of subjects from Ross Barkley to his own career in media since retiring.
He also revealed which captain was his favourite to play under: current Aston Villa assistant manager Roy Keane.
Interestingly, though, Neville also selected Hull City boss Steve Bruce in his top three and ex-Arsenal man Tony Adams.
Gary Neville recently revealed that Adams was the greatest motivator he worked with during his time with England - and brother Phil obviously feels the same.
Manchester United host West Ham United at Old Trafford in their next Premier League fixture, on Saturday at 3pm.