Gary Neville has revealed the three Manchester United legends who were the toughest to train against, despite claiming that he was not “fazed” by one. The 49-year-old ex-Manchester United defender spent the entirety of his club playing career under legendary former manager Sir Alex Ferguson at Old Trafford. Gary Neville, who was one of the famed ‘Class of ‘92’ members who broke into the United first team, enjoyed incredible success during his prolific spell with the club. The United legend lifted eight Premier League titles, two Champions Leagues, three FA Cups and three League Cups under the …