United were the lowest scorers of the Premier League's top seven last season with just 54.
Another season without silverware will raise serious doubts as to whether he really is the man to carry City to the summit of European football for the first time.
Guardiola has started rebuilding from the back by recruiting fullbacks Benjamin Mendy and Kyle Walker for around £50 million apiece.
Signing Walker was particularly eye-catching.
United finished sixth last time, but still won two trophies and in doing so also qualified for the Champions League. But he insists, despite that, the title is a more realistic target.
Zlatan Ibrahimovic is in talks with Manchester United over rejoining the club for the second half of the new season, Jose Mourinho has confirmed.
"West Ham can win at Manchester United, but I'd be happy if they came home with a point". Will Lukaku score the goals? Victor can play right-back and can play central midfield.
"But I am not a hard person to work with, in spite of sometimes it looks different or you want to make it look different". We're here to do great things.
With Diego Costa widely reported to be leaving the club, the main striker is Alvaro Morata, brought from Real Madrid, and while he is an undoubted talent, he is untested in English football.
Mourinho won't rule out Man United move for Danny Rose
The former Sweden global scored 28 goals for the Red Devils last season before suffering a knee injury against Anderlecht in April.
However, the club did win the Europa League and the League Cup, giving the manager a platform of success on which to build.
Manchester United see Tottenham Hotspur's Danny Rose as a potential solution to their search for a wide player in the transfer market, as Jose Mourinho continues to assess his options, given the club's frustrated pursuits of Internazionale's Ivan Perisic and Real Madrid's Gareth Bale. "I think it is the objective of every one of the top teams and every one of the top team managers", Mourinho said.
Liverpool's hopes hinge on hanging on to attacking ace Philippe Coutinho, with Barcelona desperate to sign him after selling fellow Brazilian Neymar to Paris St-Germain for a world record $326 million.
Mooy has again been given the No.10 shirt by manager David Wagner after his crucial role in the Terriers' unlikely promotion heroics, where he was named player of the season.
Arsenal also embarks on a new campaign uncertain whether it will hold onto a key member of its squad.
Losing Sanchez would jeopardize Arsenal's attempt to rejoin the elite.
Premier League season will kick off on a Friday night for the first time ever.
However, at the start of the window the Portuguese tactician identified four players to executive vice-chairman Ed Woodward in order to bolster his squad - meaning the job is only 75% complete, but Mourinho is adamant he won't cry if his final target fails to arrive before the end of the month.
"It looks like everywhere there is many, many players and a bit of congestion at the moment everywhere", Wenger said.
"It's going to be emotional to be in my old house against my old club, of course".
Brighton have broken their club transfer record twice in one week to draft in Davy Propper from PSV Eindhoven and Club Brugge's Jose Izquierdo, subject to medical and global clearance.