Irvine, who was youth coach at Everton under Moyes’ regime, said: “David wanted to sign him [permanently] but in the end he went back to Sporting.”
Dier spent the 2011/12 season on loan at Everton from Sporting CP, the club at which he started his career.
He was used in the Under-18 and Under-21 sides, but after showing he was already very developed, the youngster started training with Moyes’ senior team later on in his spell.
The youngster proved his ability to Moyes, and Irvine has revealed that the former Everton boss actually wanted to sign him from Sporting on a permanent deal.
However, he eventually returned to Sporting, and started playing for their first-team, before heading back to England last summer.
Tottenham Hotspur moved to sign the defender, and he has since developed from promising full-back to exceptional defensive midfielder, and he has earned his first England call-up for the ongoing international break.
Moyes clearly saw something in Dier that made him a wanted man, but for whatever reason a deal was not completed to take him to Everton, and Spurs are the side benefitting from Dier’s fantastic talents.