It was the inevitable reaction to feeble title challenges that saw Guardiola's City finish 15 points behind the victorious Chelsea side in third place and Mourinho's United drift over the line nine points further adrift.
The Hammers' last win over United was a 3-2 Premier League victory in May 2016, which was also the final game at Upton Park.
Since the end of last season, transfer records have been shattered across the country as over one billion pounds has changed hands in a frenzy that could well set a new high for a single window.
"When I was young I was doing the same".
"In my other clubs what I had was more players scoring goals", he said.
Personally, I believe they'll top their previous achievement.
"I don't there's extra pressure on me".
Was Lady Stoneheart in the latest episode of Game of Thrones?
Season 1 ended with the death of Ned Stark, arguably the show's central character up until that point. There may be a "ghost" hanging around Winterfell , and we're not talking about Jon Snow's direwolf.
Premier League previews and pundit predictions are awash in the media this morning ahead of the big kick-off.
Whilst Premier League teams have no problems attracting quality players, it is now time for them to upgrade their tactics.
"Of course [Guardiola being in charge] had an influence on me".
And that's that - not one transfer rumour in this column - surely a first?
"I'm happy with the club's efforts".
I think I'm the coach of this team.
But winning the financial backing of Newcastle owner Mike Ashley has proved much tougher and Newcastle's travails in the transfer market over the last two months threaten to lead to a messy divorce. City lack depth at centre-back where Vincent Kompany, John Stones and Nicolás Otamendi are the only senior options.
Gold prices surge in Dubai, will it rise further?
It soared over 2 per cent in the previous two sessions, and is set for a weekly gain of 2.25 per cent. Housebuilders Persimmon, Taylor Wimpey and Barratt fell by 2.8 to 3% on weak house price data .
Unlike last season, City should be expected to line-up with as many formations as you may think especially now that Pep finally has very good squad depth going forward.
Ederson said he settled in quickly at the Etihad Stadium and said he spoke to fellow Brazilians Fernandinho and Gabriel Jesus before completing the move.
Yet perhaps the Premier League's most memorable moment - certainly the most crucial when it comes to marketing and its ongoing credibility - came just two years ago, when Claudio Ranieri's relegation-fancied Leicester staggered the country by waltzing away with the league title with the kind of ease their striker Jamie Vardy usually reserves for vodka and a bag of Skittles.
I see West Ham as a mid-table side looking upwards, but it is asking a lot for them to get anything at Old Trafford. Guardiola has been foot flawless all summer and made big additions to his squad early and often. The beginning of the season has been great. No, I'm just myself.
The midfield looks fairly well stacked as Yaya Touré, David Silva, Kevin De Bruyne, Leroy Sané, Raheem Sterling and, when fit again, Ilkay Gundogan will provide plenty of ammunition for the strikers to feed off. They told me this is a really big club with a nice history.
Arsenal also embarks on a new campaign uncertain whether it will hold onto a key member of its squad.
Sean Dyche says Burnley's win over Chelsea quietens doubters
Mauricio Pellegrino had to settle for a point in his first match as Southampton manager as his side wasted a series of chancs. That it took until a 2-0 win at Crystal Palace on April 29 to pick up their first away victory says an bad lot.
- Conte on Pedro, Morata, Wenger's comments and Chelsea's search for players
- Manchester City overwhelmingly the pick to win 2017-18 title
- ES Views Letter of the Day: Gatlin's victory has damaged athletics
- Pep Guardiola forecasts end to Manchester City spending spree
- Usain's cousin: "I'm happy Justin won it".
- Girl's face severely burned when another girl pours boiling water on her
- Premier League 2017/18: Top 10 new signings to watch out for
- Stocks plunge amid growing North Korean-US tensions, gold continues rise
- TSX hits 1-month low on risk aversion, lower oil prices
- Global shares mostly lower on rising unease over North Korea