Both have already surged past the £100m mark as they look to improve on last season's respective 3rd and 6th place finishing spots, and the chances of hitting £200m increase with every completed deal.
City, who last won the title in 2014 and finished 15 points behind champions Chelsea last season, have added goalkeeper Ederson for a reported 34.7 million pounds ($44.92 million), midfielder Bernardo Silva for 43 million pounds and defender Kyle Walker for 50 million pounds.
Having grown up (football-wise) in Portugal and having learned his trade with Sporting CP's youth establishment, Eric Dier has transformed into one of the most important cogs of Tottenham's superb midfield - his positional awareness, discipline and underrated passing ability creating the solid base for those further forward to unleash their considerable attacking talents.
Instead, the former Valencia manager has predicted that the title will come to Manchester.
And it is for that reason why Neville believes Chelsea cannot be considered favourites in his eyes.
Ross Barkley in action for Everton against Tottenham last season
Alexandre Lacazette, Antonio Rudiger and Mohamed Salah have already arrived, to name a few, and with the season still a month away, more big names can be expected. Chelsea getting N'Golo Kante [last year] was a masterstroke and Eden Hazard and Diego Costa came back to form.
Man United could only finish sixth in the Premier League table last season, while Man City ended the campaign in third as Chelsea were crowned champions. They have also suggested that Anthony Martial could be part of the deal, although Martial remains in America with United on their US tour.
We will automatically post your comment and a link to the news story to your Facebook timeline at the same time it is posted on MailOnline.
The Premier League has welcomed some of Europe's top talent this summer in a busy start to the transfer window - and many continue to be linked with joining them. "You're not just talking about winning the Premier League title, you're talking about competing in Europe".