Despite winning their opening seven games of the season in all competitions, the warning signs were there for Slot.
Here is a look at how eight of them have fared so far.
Manchester United manager Ruben Amorim welcomed the backing of co-owner Jim Ratcliffe on Friday but said it did not ease the pressure of needing to turn around his side's fortunes quickly.
Liverpool trolled United on social media this week, reminding them of the 7-0 drubbing they dished out in March 2023.
Amorim's squad was boosted by more than 200 million pounds worth of new signings in the summer.
Manchester United cruised to a rare comfortable home Premier League victory on Saturday as goals from Mason Mount and Benjamin Sesko secured a 2-0 win over Sunderland.
Manchester United manager Ruben Amorim said he does not intend to resign but acknowledged that positive results are crucial to keeping his position at Old Trafford, as pressure mounts following a woeful start to the season.
Wayne Rooney says Manchester United have lost their soul and he has no faith in the ability of beleaguered manager Ruben Amorim to turn things around.
Ruben Amorim warned Manchester United to stop making life so "complicated" for themselves after they eased the pressure on their beleaguered boss with a 2-1 win against Chelsea on Saturday.
Manchester United manager Ruben Amorim said he does not intend to resign but acknowledged that positive results are crucial to keeping his position at Old Trafford, as pressure mounts following a woeful start to the season.
Wayne Rooney says Manchester United have lost their soul and he has no faith in the ability of beleaguered manager Ruben Amorim to turn things around.
Ruben Amorim warned Manchester United to stop making life so "complicated" for themselves after they eased the pressure on their beleaguered boss with a 2-1 win against Chelsea on Saturday.
Manchester United boss Ruben Amorim said not even the pope could make him deviate from playing with a back three despite mounting pressure following a dismal run, adding that abandoning his preferred formation would undermine him in his players' eyes.
Chelsea manager Enzo Maresca faces the daunting task of ending a 12-year drought at Old Trafford when his side visit Manchester United, with the Italian insisting on Friday that there is never a good time to face them despite their early-season struggles.
Manchester City's goal-scoring machine Erling Haaland struck twice in a 3-0 Premier League thrashing of Manchester United on Sunday, giving Pep Guardiola's side bragging rights in the latest edition of the derby.
Lionel Messi's Panenka penalty miss in Inter Miami's 3-0 defeat against Charlotte FC in an MLS encounter on Saturday reignited comparisons with Cristiano Ronaldo.
Onana's future at Old Trafford was in doubt after United signed Antwerp goalkeeper Senne Lammens for 21 million euros (£18.2 million) plus add-ons.
City boss Pep Guardiola and United manager Ruben Amorim are both under intense pressure just three games into the season.
Napoli have signed Denmark striker Rasmus Hojlund from Manchester United on a season-long loan, the Serie A club said on Monday, easing the Italian champions' concerns over their lack of depth up front following Romelu Lukaku's injury.
