Not only that, it was the record transfer fee involving two Premier League clubs and made Dele the most expensive English footballer of all-time, beating the record held by his City teammate, Raheem Sterling who cost £50m from Liverpool.
"They have to hang on to two or three players", Neville told his Sky Sports podcast.
The forward has featured in 36 matches in all competitions and has scored six goals and created two assists.
Spurs struggled when they played at Wembley in Europe this season, only winning one out of four matches, and hopefully there are ideas in place to improve things there off the pitch because it is going to be hard for the supporters too.
"There will be some players we decide to sell but it will always be the club's decision".
I want to congratulate all and say thank you to all of my players and staff and the fans.
Harry Kane believes there are few clubs in the world more attractive right now than Tottenham Hotspur.
I put trophies above finishing top four - Mourinho takes swipe at Wenger
Speaking to Sky Sports after the 1-2 loss to Tottenham on Sunday, the United manager said: "What we did was compulsory. Jose Mourinho is world known the world over for his in-match tactics and the mind games he plays beforehand.
However, as with numerous club's top players, they continue to be linked with exits given Tottenham's wait for major trophies continues as they failed at the final few hurdles again this season.
"The third person they need to keep is the manager". I know they have got a long waiting list for season ticket holders but it can go backwards quickly.
Juventus probably have the best defensive unit in Europe but, other than that, I don't see anything better than what Spurs have got.
"But we're going into bigger and better things, and the new stadium is going to be unbelievable".
Kenyan midfielder Victor Wanyama says his Tottenham Hotspur side were sure of beating Arsenal even before setting foot to the pitch on Sunday. Kane said that his team had the ability to win titles.
"I spoke to Dele Alli and he is desperate to get to 20 league goals, it's not going to be easy for him, but I think the key for him, and Spurs, is in midfield".